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by Asiri, Abdullah M.; Faidallah, Hassan M.; Al-Youbi, Abdulrahman O.; Alamry, Khalid A.; Ng, Seik Weng
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract In the mol­ecule of the title compound, C21H14N2O3, the tetra­hydro­benzo[h]quinoline fused-ring system is buckled owing to the ethyl­ene –CH2CH2– fragment, the benzene ring and the pyridine ring being twisted by 24.3 (1)°. The ring of the benzodioxol system is bent away from the pyridine ring by 61.4 (1)° in order to avoid crowding the cyanide substituent. Two mol­ecules are...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3200803
PubMed Central
by Asiri, Abdullah M.; Faidallah, Hassan M.; Al-Youbi, Abdulrahman O.; Alamry, Khalid A.; Ng, Seik Weng
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract In the mol­ecule of the title compound, C20H13BrN2O, the tetra­hydro­benzo[h]quinoline fused-ring system is buckled owing to the ethyl­ene –CH2CH2– fragment, the benzene ring and the pyridine ring being twisted by 17.7 (1)°. The 4-substituted aromatic ring is bent away from the pyridine ring by 82.3 (1)° in order to avoid crowding the cyanide substituent. Two mol­ecules are...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3200630
PubMed Central
by Asiri, Abdullah M.; Faidallah, Hassan M.; Al-Nemari, Khulud F.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract In the title compound, C17H12O3, each of the five-membered rings in the inden-1-one and 1,3-benzodioxole residues is almost planar (r.m.s. deviations = 0.041 and 0.033 Å, respectively). A small twist about the single bond linking the two residues is evident [the C—C—C—C torsion angle = 8.7 (4)°]. Supra­molecular zigzag layers propagating in the ac plane are formed in the crystal...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3343980
PubMed Central
by Al-Youbi, Abdulrahman O.; Asiri, Abdullah M.; Faidallah, Hassan M.; Alamry, Khalid A.; Ng, Seik Weng
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract The asymmetric unit of the title compound, C17H13N3, contains two independent mol­ecules, which are non-planar as they are buckled owing to the ethyl­ene portion. The dihedral angle between the benzene rings is 26.4 (1)° in one mol­ecule and 32.9 (1)° in the other. In the crystal, the mol­ecules are disposed about a false inversion center, and are linked by two N—H⋯N hydrogen...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3201274
PubMed Central
by Asiri, Abdullah M.; Faidallah, Hassan M.; Al-Youbi, Abdulrahman O.; Sobahi, Tarik R.; Ng, Seik Weng
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract The mol­ecule of the title compound, C8H6N2OS2, has a V shape with two five-membered rings attached to a methyl­ene C atom. All non-H atoms are approximately coplanar (r.m.s. deviation = 0.096 Å). In the crystal, mol­ecules are linked by N—H⋯O hydrogen bonds into layers. The thio­phene ring is disordered over two positions; the major orientation has an occupancy of 0.683 (3). is...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3200739
PubMed Central
by Asiri, Abdullah M.; Al-Youbi, Abdulrahman O.; Faidallah, Hassan M.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract Significant twists between the aromatic rings are evident in the structure of the title compound, C16H12F3N3O2S. With reference to the pyrazole plane, the N- and C-bound benzene rings form dihedral angles of 57.12 (11) and 29.75 (11)°, respectively. The dihedral angle between the benzene rings is 52.82 (11)°. The presence of N—H⋯O(sulfonamide) and N—H⋯N(pyrazole) hydrogen bonds...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3200877
PubMed Central
by Asiri, Abdullah M.; Al-Youbi, Abdulrahman O.; Zayed, Mohie E. M.; Ng, Seik Weng
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract The non-H atoms of the title compound, C9H8ClN3O3, lie approximately on a plane (r.m.s. deviation = 0.111 Å), and the C=N double bond has a Z configuration. In the crystal, adjacent mol­ecules are linked by an N—H⋯Ocarbon­yl hydrogen bond, forming a chain running along [101].
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3212345
PubMed Central
by Asiri, Abdullah M.; Arshad, Muhammad Nadeem; Sobahi, Tariq R.; Mustafa, Ghulam
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 69 . Abstract Two independent mol­ecules, A and B, comprise the asymmetric unit of the title compound, C21H18N2OS, with the difference in the angle of orientation between the naphthalene ring system and the mean plane of the cyclo­heptyl ring [16.13 (1) in A and 11.48 (5)° in B], being evident. The cyclo­heptyl ring adopts a distorted chair conformation in each mol­ecule with r.m.s. deviations of...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3569254
PubMed Central
by Asiri, Abdullah M.; Khan, Salman A.; Tahir, M. Nawaz
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract In the title compound, C26H21N3O, the phenyl ring of the 4-amino­anti­pyrine group and the heterocyclic five-membered ring along with its substituents, except for the N-bound methyl group (r.m.s. deviation = 0.0027 Å), form a dihedral angle of 54.20 (5)°. Two S(6) ring motifs are formed due to intra­molecular C—H⋯N and C—H⋯O hydrogen bonds. In the crystal, mol­ecules are...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3213599
PubMed Central
by Asiri, Abdullah M.; Khan, Salman A.; Tahir, M. Nawaz
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract In the title compound, C16H13ClN2S, the mean planes fitted through all non-H atoms of the heterocyclic five-membered and the benzene rings are oriented at a dihedral angle of 5.19 (7)°. In the crystal, a weak C—H⋯π inter­action occurs, along with weak π–π inter­actions [cenroid–centroid distance = 3.7698 (11) Å].
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3200582
PubMed Central
by El-Shishtawy, Reda M; Mohamed, Saleh A; Asiri, Abdullah M; Gomaa, Abu-bakr M; Ibrahim, Ibrahim H; Al-Talhi, Hasan A
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This article is from BMC Biotechnology , volume 14 . Abstract Back ground: For enzyme production, the costs of solid state fermentation (SSF) techniques were lower and the production higher than submerged cultures. A large number of fungal species was known to grow well on moist substrates, whereas many bacteria were unable to grow under this condition. Therefore, the aim of this study was to isolate a highly efficient strain of Bacillus sp utilizing wheat bran in SSF and optimizing the enzyme...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4004419
PubMed Central
by Asiri, Abdullah M.; Faidallah, Hassan M.; Al-Nemari, Khulud F.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract In the title compound, C14H10O2, the five-membered ring of the inden-1-one residue is almost planar (r.m.s. deviation = 0.035 Å). A twist about the single bond linking the two residues is evident [C—C—C—C torsion angle = −13.2 (5)°]. The three-dimensional architecture is stabilized by C—H⋯O (involving the trifurcated carbonyl O atom), C—H⋯π and π–π inter­actions...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3344023
PubMed Central
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This article is from Nanoscale Research Letters , volume 9 . Abstract A Co3O4/Fe2O3 composite nanofiber-based solar photocatalyst has been prepared, and its catalytic performance was evaluated by degrading acridine orange (AO) and brilliant cresyl blue (BCB) beneath solar light. The morphological and physiochemical structure of the synthesized solar photocatalyst was characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4169707
PubMed Central
by Asiri, Abdullah M.; Al-Youbi, Abdulrahman O.; Faidallah, Hassan M.; Ng, Seik Weng
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract The asymmetric unit of the diamine compound, C18H14F3N2O2S2, consists of two mol­ecules; the C=C double bond has a Z configuration in the C4H3S—C=C—C(=O)—C segment. The –NH—CH2—CH2—NH chain adopts a twisted U-shape. The amino group is an intra­molecular hydrogen-bond donor to the carbonyl group; the intra­molecular hydrogen bond generates a six-membered ring. In both...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3201547
PubMed Central
by Asiri, Abdullah M.; Al-Youbi, Abdulrahman O.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract A twist is evident in the title compound, C21H21N3O2, the dihedral angle between the terminal six-membered rings being 29.46 (10)°; the linked five- and six-membered rings are coplanar [1.30 (11)°]. The carbonyl O atom accepts intra­molecular hydrogen bonds from the adjacent hy­droxy and amine groups. The three-dimensional crystal packing is achieved through C—H⋯π inter­actions.
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3297862
PubMed Central
by Asiri, Abdullah M.; Faidallah, Hassan M.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract The central carbonyl group in the title compound, C20H18FN3O2, forms amine–hy­droxy N—H⋯O and hy­droxy–hy­droxy O—H⋯O hydrogen bonds, leading to two S(6) rings. The N-bound phenyl ring is coplanar with the five-membered ring to which it is attached [dihedral angle = 6.27 (10)°], but an overall twist in the mol­ecule is evident, the dihedral angle between the terminal phenyl...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3295528
PubMed Central
by Shafiq, Muhammad; Khan, Islam Ullah; Zia-ur-Rehman, Muhammad; Arshad, Muhammad Nadeem; Asiri, Abdullah M.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract In the title compound, C9H11N3O2S, the thia­zine ring adopts a half-chair conformation. In the crystal structure N—H⋯N hydrogen bonds connect two mol­ecules into a centrosymmetric dimer, forming an R22(6) ring motif. These dimers are further connected into chains by N—H⋯O and C—H⋯O hydrogen bonds.
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3213487
PubMed Central
by Arshad, Muhammad Nadeem; Khan, Islam Ullah; Rafique, H. M.; Asiri, Abdullah M.; Shafiq, Muhammad
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract In the title compound, C13H9ClINO4S, the dihedral angle between the aromatic rings is 81.04 (17)°. The disposition of the I and Cl atoms attached to the two rings is anti. In the crystal, mol­ecules are connected via O—H⋯O and N—H⋯O hydrogen bonds.
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3120592
PubMed Central
by Al-Youbi, Abdulrahman O.; Asiri, Abdullah M.; Faidallah, Hassan M.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract In the title mol­ecule, C12H12N2O, the five- and six-membered rings form a dihedral angle of 68.41 (16)°. The aldehyde group is nearly coplanar with the pyrazole ring [C—C—C—O torsion angle = −0.4 (5)°]. The three-dimensional architecture is sustained by weak C—H⋯O and C—H⋯π inter­actions.
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3344012
PubMed Central
by Asiri, Abdullah M.; Arshad, Muhammad Nadeem; Ishaq, Muhammad; Alamry, Khalid A.; Bokhari, Tanveer Hussain
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract In the title complex, [PtCl2(C6H16N2)], the PtII atom adopts a distorted cis-PtN2Cl2 square-planar coordination geometry. The five-membered chelate ring adopts a twisted conformation. In the crystal, weak C—H⋯Cl hydrogen bonds link the mol­ecules into (001) sheets.
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3588799
PubMed Central
by Asiri, Abdullah M.; Faidallah, Hassan M.; Alamry, Khalid A.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract The title compound, C23H17N3O, has been previously described in a monoclinic P21/c polymorph with Z = 4 [Asiri, Al-Youbi, Faidallah, Ng & Tiekink (2011). Acta Cryst. E67, o2449]. In the new monoclinic P21/n form, with Z = 8, there are two independent mol­ecules, A and B, in the asymmetric unit. In both mol­ecules, the cyclo­hexa-1,3-diene ring has a screw-boat conformation, whereas it...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3344100
PubMed Central
by Chani, Muhammad Tariq Saeed; Karimov, Kh. S.; Asiri, Abdullah M.; Ahmed, Nisar; Bashir, Muhammad Mehran; Khan, Sher Bahadar; Rub, Malik Abdul; Azum, Naved
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This article is from PLoS ONE , volume 9 . Abstract This work presents the fabrication and investigation of thermoelectric cells based on composite of carbon nanotubes (CNT) and silicone adhesive. The composite contains CNT and silicon adhesive 1∶1 by weight. The current-voltage characteristics and dependences of voltage, current and Seebeck coefficient on the temperature gradient of cell were studied. It was observed that with increase in temperature gradient the open circuit voltage, short...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3991607
PubMed Central
by Asiri, Abdullah M.; Al-Youbi, Abdulrahman O.; Khan, Salman A.; Tahir, M. Nawaz
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract In the title compound, C21H16N2O2, the five-membered heterocyclic ring makes a dihedral angle of 47.06 (6)° with the attached benzene ring, whereas the indan-1,3-dione ring system and the benzene ring are oriented at a dihedral angle of 21.92 (7)°. In the crystal, inversion dimers linked by pairs of C—H⋯O hydrogen bonds generate R22(22) loops. Aromatic π–π stacking inter­actions...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3239055
PubMed Central
by Khan, Sher Bahadar; Rahman, Mohammed M.; Akhtar, Kalsoom; Asiri, Abdullah M.; Rub, Malik Abdul
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This article is from PLoS ONE , volume 9 . Abstract In this contribution, a significant catalyst based on spinel ZnMn2O4 composite nanoparticles has been developed for electro-catalysis of nitrophenol and photo-catalysis of brilliant cresyl blue. ZnMn2O4 composite (hetaerolite) nanoparticles were prepared by easy low temperature hydrothermal procedure and structurally characterized by X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), X-ray photoelectron...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3897427
PubMed Central
by Shafiq, Muhammad; Khan, Islam Ullah; Zia-ur-Rehman, Muhammad; Arshad, Muhammad Nadeem; Asiri, Abdullah M.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract In the title compound, C16H14ClN3O3S, the thia­zine ring adopts a sofa (half-chair) conformation, with an r.m.s. deviation from the mean plane of 0.23 Å. The S atom and S-bonded C atom exhibit the maximum deviations from the thia­zine mean plane [−0.3976 (12) and 0.3179 (14) Å, respectively]. The conformations around the double bonds in the R2C=N—N=CHR unit are Z and E. An...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3275000
PubMed Central
by Asiri, Abdullah M.; Faidallah, Hassan M.; Alamry, Khalid A.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract In the title compound, C14H10F3N3O3S, there are significant twists in the mol­ecule, as seen in the values of the dihedral angles between the pyrazole ring and each of the furan [31.1 (2)°] and benzene rings [55.58 (10)°]. The amino N atom occupies a position almost normal to the benzene ring [N—S—Car—Car (ar = aromatic) torsion angle = 83.70 (19)°]. One amino H atom forms a...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3344109
PubMed Central
by Munir, Ayesha; Mubashar-ur-Rehman, Hafiz; Asiri, Abdullah M.; Khan, Islam Ullah; Arshad, Muhammad Nadeem
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 69 . Abstract In the title compound, C13H8Cl3NO4S, the aromatic rings are oriented at a dihedral angle of 68.94 (1)° and the mol­ecule adopts a V-shape. An intra­molecular N—H⋯O inter­action generates a six-membered S(6) ring motif. In the crystal, pairs of O—H⋯O hydrogen bonds involving the carb­oxy group link the mol­ecules into inversion dimers with an R22(8) motif. N—H⋯O and...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3684920
PubMed Central
by Asiri, Abdullah M.; Faidallah, Hassan M.; Alamry, Khalid A.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract In the title compound, C22H18F6N2O2, the five atoms comprising each O=C—C=C—N fragment are almost coplanar (the r.m.s. deviation for the fitted atoms being 0.008 and 0.002 Å) and form a dihedral angle of 47.70 (12)°. The phenyl ring attached to each of the O=C—C=C—N fragments is twisted out of the respective plane with dihedral angles of 64.46 (11) and 61.82 (10)°,...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3394068
PubMed Central
by Al-Youbi, Abdulrahman O.; Asiri, Abdullah M.; Faidallah, Hassan M.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract The title mol­ecule, C11H15N3O2S, features a five-membered ring which is twisted about the middle CH2—CH2 bond. The benzene ring is inclined with respect to the imine residue [C—N—N—C torsion angle = 165.4 (2)°]. Supra­molecular layers in the bc plane are formed by hydrogen bonds between the amine H atoms and sulfonamide O and imine N atoms, as well as by a weak hydrazine H-atom...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3344133
PubMed Central
by Asiri, Abdullah M.; Faidallah, Hassan M.; Alamry, Khalid A.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract In the title compound, C24H19N3O2, the partially saturated ring adopts a distorted half-chair conformation with the methyl­ene-C atom closest to the amino­benzene ring lying 0.664 (3) Å out of the plane defined by the five remaining atoms (r.m.s. deviation = 0.1429 Å. The dihedral angle [32.01 (10)°] between the benzene rings on either side of this ring indicates a significant...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3344065
PubMed Central
by Khan, Anish; Khan, Aftab Aslam Parwaz; Asiri, Abdullah M.; Rub, Malik Abdul
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This article is from PLoS ONE , volume 9 . Abstract Poly(o-anisidine) molybdophosphate was expediently obtained by sol-gel mixing of Poly(o-anisidine) into the inorganic matrices of molybdophosphate, which was allowed to react with silver nitrate to the formation of poly(o-anisidine) molybdophosphate embedded silver nano composite. The composite was characterized by Fourier Transform Infrared Spectroscopy, X-ray powder diffraction, UV-Vis Spectrophotometry, Fluorescence Spectroscopy, Scanning...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4013135
PubMed Central
by Asiri, Abdullah M.; Faidallah, Hassan M.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract In the title compound, C11H8N2O2S, there is a twist in the mol­ecule, with the dihedral angle between the five- and six-membered rings being 31.77 (9)°. The nitro group is slightly twisted out of the plane of the benzene ring to which it is attached [O—N—C—C torsion angle = 9.0 (3)°]. The S and N atoms are syn. In the crystal, supra­molecular layers parallel to (-204) are formed...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3394067
PubMed Central
by Asiri, Abdullah M.; Al-Youbi, Abdulrahman O.; Faidallah, Hassan M.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract The central residue in the title compound, C21H21N3O3, is close to planar (r.m.s. deviation = 0.0753 Å for all non-H atoms from OH to NH inclusive): the hy­droxy, amino and carbonyl groups all lie to the same side of the mol­ecule (the conformation about the ethene bond is Z), facilitating the formation of intra­molecular O—H⋯O and N—H⋯O hydrogen bonds that close S(6) rings....
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3200693
PubMed Central
by Asiri, Abdullah M.; Faidallah, Hassan M.; Sobahi, Tariq R.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract In the title compound, C8H10N2O3S, the dihedral angle between the acetamide group and the benzene ring is 15.59 (12)° and the amino group is close to being perpendicular to the benzene ring [N—S—Car—Car (ar = aromatic) torsion angle = 109.4 (2)°]. In the crystal, mol­ecules are linked into supra­molecular tubes parallel to [001] by amine–amide N—H⋯O inter­actions and these...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3344098
PubMed Central
by Asiri, Abdullah M.; Faidallah, Hassan M.; Hameed, Salem A.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract The title compound, C14H12N2O2, is almost planar with an r.m.s. deviation for all non-H atoms of 0.038 Å. The observed planarity is rationalized in terms of a close intra­molecular C—H⋯O inter­action. Supra­molecular layers, two mol­ecules thick and with a step topology, are formed in the crystal packing via C—H⋯O contacts involving the carbonyl O atom, which accepts two such...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3344066
PubMed Central
by Asiri, Abdullah M.; Al-Youbi, Abdulrahman O.; Khan, Salman A.; Tahir, M. Nawaz
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract In the title compound, C15H13NO3S, the benzene ring and the five-membered heterocyclic ring are oriented at a dihedral angle of 12.00 (6)°. In the crystal, C—H⋯O inter­actions generate two types of cyclic motifs, R22(14) and R22(26), connecting the mol­ecules into tapes extending along [101]. In addition, there are π–π stacking inter­actions between the benzene and thio­phene...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3238980
PubMed Central
by Ahmad, Naveed; Zia-ur-Rehman, Muhammad; Siddiqui, Hamid Latif; Arshad, Muhammad Nadeem; Asiri, Abdullah M.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract The six-membered heterocycle in the title compound, C18H16BrN3O4S, adopts a sofa conformation. Intra­molecular N—H⋯N and O—H⋯O hydrogen bonds stabilize the mol­ecular conformation by forming a five- and a six-membered ring, respectively. The crystal packing is stabilized by inter­molecular C—H⋯O hydrogen bonds.
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3201552
PubMed Central
by Asiri, Abdullah M.; Faidallah, Hassan M.; Al-Nemari, Khulud F.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract In the title compound, C17H14O2, the indan-1-one system is almost planar (r.m.s. deviation = 0.007 Å) and the benzene ring is twisted out of its plane by 8.15 (6)°. The conformation about the C=C double bond [1.348 (2) Å] is E. Helical supra­molecular chains along [010] feature in the crystal packing; these are sustained by C—H⋯O hydrogen bonds and π–π inter­actions...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3297877
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by Asiri, Abdullah M.; Faidallah, Hassan M.; Al-Nemari, Khulud F.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract The title indan-1-one derivative, C18H14O, is planar with an r.m.s. deviation for all 19 non-H atoms of 0.098 Å. The conformation about each of the C=C bonds [1.343 (3) and 1.349 (3) Å] is E. Supra­molecular layers in the bc plane, mediated by C—H⋯O and π–π [ring centroid–centroid distance = 3.5282 (15) Å] inter­actions, feature in the crystal packing.
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3297876
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by Asiri, Abdullah M.; Faidallah, Hassan M.; Al-Youbi, Abdulrahman O.; Ng, Seik Weng
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract The two aromatic rings of the title compound, C11H13N3O2S, are inclined at an angle of 47.81 (4)°. The N atom of the amino unit is pyramidally coordinated; one H atom inter­acts with the sulfamyl O atom of an adjacent mol­ecule, forming a centrosymmetric hydrogen-bonded dimer. The dimers are linked by N—H⋯N hydrogen bonds, generating a three-dimensional network.
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3200907
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by Asiri, Abdullah M.; Al-Youbi, Abdulrahman O.; Faidallah, Hassan M.; Alamry, Khalid A.; Ng, Seik Weng
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract Mol­ecules of the title compound, C14H16N2S2, have a centre of inversion in the middle of the –CH2–CH2– bond; the (C4H3S)(CH3)C=N–CH2– moiety is almost planar (r.m.s. deviation for non-H atoms 0.027 Å).
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3200618
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by Asiri, Abdullah M.; Al-Youbi, Abdulrahman O.; Zayed, Mohie E. M.; Ng, Seik Weng
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract The asymmetric unit of the title compound, C10H11ClN2O, contains two mol­ecules. The non-H atoms of each mol­ecule lie approximately on a plane (r.m.s. deviations = 0.062 and 0.110 Å), and the C=N double bond has a Z-configuration in both independent mol­ecules. In the crystal, adjacent mol­ecules are linked by N—H⋯Ocarbon­yl hydrogen bonds, forming chains running along [100].
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3212346
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by Asiri, Abdullah M.; Faidallah, Hassan M.; Al-Youbi, Abdulrahman O.; Alamry, Khalid A.; Ng, Seik Weng
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract In the mol­ecule of the title compound, C20H14N2O, the tetra­hydro­benzo[h]quinoline fused-ring system is buckled owing to the ethyl­ene –CH2CH2– fragment, the benzene ring and the pyridine ring being twisted by 19.7 (1)°. The 4-substituted aromatic ring is bent away from the pyridine ring by 62.9 (1)° in order to avoid crowding the cyanide substituent. In the crystal, two...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3200766
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by Asiri, Abdullah M.; Al-Youbi, Abdulrahman O.; Faidallah, Hassan M.; Badahdah, Khadija O.; Ng, Seik Weng
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract The six-membered N-heterocyclic ring of title compound, C17H17ClN2O, is fused with a methyl-substituted cyclo­hexene ring. The nitro­gen-bearing ring has an envelope conformation with the benzene ring-bearing C atom lying 0.432 (6) Å out of the plane defined by the other five atoms (r.m.s. deviation 0.011 Å); its benzene substituent is aligned at 84.7 (1)° to the latter plane. The...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3201290
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by Arshad, Muhammad Nadeem; Khan, Islam Ullah; Zia-ur-Rehman, Muhammad; Shafiq, Muhammad; Asiri, Abdullah M.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract In the title compound, C17H15NO5S, the benzene ring of the fused-ring system is twisted by 11.67 (6)° with respect to the thia­zine ring. The atoms of the four-atom methyl ester group and the phenyl ring of the benzyl unit are inclined at 16.50 (7) and 44.52 (3)° with respect to the thia­zine ring. An intra­molecular O—H⋯O hydrogen bond gives rise to a six-membered S(6) ring...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3151898
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by Arshad, Muhammad Nadeem; Khan, Islam Ullah; Holman, K. Travis; Asiri, Abdullah M.; Rafique, H. M.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract In the title compound, C20H18BrNO4S2, the mean planes formed by the toluene substituents are inclined at a dihedral angle of 45.34 (8)°. The bromo­benzene group is disordered over two positions with an occupancy ratio of 0.74:0.26, resulting in two conformations of the ring; the two rings are oriented at a dihedral angle of 6.6 (6)° with each other. In the crystal structure, weak...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3200778
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by Al-Youbi, Abdulrahman O.; Asiri, Abdullah M.; Faidallah, Hassan M.; Ng, Seik Weng
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract The nine-membered fused-ring system of the title pyridazine derivative, C7H7N3OS, is almost planar (r.m.s. deviation 0.012 Å). In the crystal, the amino H atom forms a hydrogen bond to the ketonic O atom of a neighboring mol­ecule to generate a centrosymmetric dimer.
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3200824
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by Asiri, Abdullah M.; Faidallah, Hassan M.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract In the title compound, C17H17BrN2O, the N-containing ring adopts an envelope conformation with the C atom carrying the phenyl ring displaced by −0.531 (9) Å from the plane defined by the remaining five atoms (r.m.s. deviation = 0.0099 Å). The benzene ring is almost orthogonal to the ring to which it is attached, the CCN—C—CPh—CPh torsion angle being −101.3 (7)°. The...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3414305
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by Arshad, Muhammad Nadeem; Danish, Muhammad; Tahir, Muhammad Nawaz; Khalid, Savera; Asiri, Abdullah M.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract In the title compound, C12H16N2O6S, the S atom adopts a distorted tetra­hedral geometry with an O—S—O angle of 119.76 (13)°. The nitro group is twisted by 35.34 (2)° with respect to the aromatic ring; it accepts an N—H⋯O hydrogen bond, resulting in a S(7) motif. In the crystal, N—H⋯O and O—H⋯O hydrogen bonds connect the mol­ecules into an infinite chain along the a...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3415013
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by Asiri, Abdullah M.; Faidallah, Hassan M.; Alamry, Khalid A.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract In the title compound ethanol monosolvate, C23H21N3O2S·C2H5OH, the dihydro­pyrazole ring is twisted about the Csp3—Csp3 bond. Nevertheless, the ring approximates a plane (r.m.s. deviation for the fitted atoms = 0.132 Å) and forms dihedral angles of 5.80 (13) and 12.29 (12)°, respectively, with the fused- and sulfonamide-benzene rings. As the dihydro­pyrazole C-bound phenyl group...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3394043
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by Asiri, Abdullah M.; Arshad, Muhammad Nadeem; Zia-ur-Rehman, Muhammad; Sobahi, Tariq R.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 69 . Abstract The title compound, C18H22N2O5S, is largely planar, with an r.m.s. deviation of 0.0546 (1) Å of atoms from the mean plane through all non-H atoms except for the methyl groups. The benzene and pyrimidine­dione rings are inclined to one another at a dihedral angle of 1.41 (7)°. In the crystal, weak C—H⋯O inter­actions connect the mol­ecules into chains propagating along the b-axis...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3588229
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by Asiri, Abdullah M.; Faidallah, Hassan M.; Ng, Seik Weng
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract The thia­zole–pyridazine fused-ring system of the title compound, C13H12N4O3S2, is approximately planar (r.m.s. deviation = 0.037 Å); the benzene ring connected to the fused-ring system through the N atom is twisted by 39.3 (1)°. The amine group uses an H atom to form a hydrogen bond to the ketonic O atom of an inversion-related mol­ecule to generate a dimer; adjacent dimers are...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3151867
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by Asiri, Abdullah M.; Faidallah, Hassan M.; Alamry, Khalid A.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract In the title compound, C14H11ClN2O2, two independent mol­ecules (A and B) comprise the asymmetric unit with the main difference between them being the relative orientation of the pendent phenyl ring with respect to the fused-ring system [dihedral angles = 8.32 (8)° (A) and 28.32 (8)° (B)]. In the crystal, the A mol­ecules are connected into a linear supra­molecular chain along the a...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3394042
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by Asiri, Abdullah M.; Faidallah, Hassan M.; Alamry, Khalid A.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract In the title compound, C20H18O2, the fused-ring systems are essentially planar (r.m.s. deviations of the nine fitted atoms = 0.009 and 0.027 Å) and exhibit an orthogonal relationship [dihedral angle = 79.83 (5)°]. To a first approximation, the ketone-O atoms are directed to opposite sides of the mol­ecule. A three-dimensional architecture arises in the crystal packing owing to...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3414182
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by Asiri, Abdullah M.; Faidallah, Hassan M.; Al-Thabaiti, Shaeel A.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 68 . Abstract In the title compound, C9H7N3, the N-bound methyl group and vinyl H atom are syn. The 12 non-H atoms comprising the mol­ecule are essentially coplanar (r.m.s. deviation = 0.071 Å). Supra­molecular tapes feature in the crystal packing, orientated perpendicular to [10-1], and are formed by C—H⋯N inter­actions involving each cyano N atom. The tapes are connected into layers via π–π...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3344110
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by Asiri, Abdullah M.; Faidallah, Hassan M.; Al-Youbi, Abdulrahman O.; Alamry, Khalid A.; Ng, Seik Weng
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract In the N-substituted benzoyl­thio­urea, C24H23N5OS, the benzoyl­thio­urea unit is non-planar (r.m.s. deviation = 0.126 Å). The aliphatic part of the tetra­hydro­quinoline fused-ring system is disordered over two positions in a 0.592 (5):0.408 (5) ratio. The pyridine and pyrrole rings are twisted by 55.2 (1)° in order to avoid crowding of their respective substituents. Pairs of...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3200694
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by Asiri, Abdullah M.; Faidallah, Hassan M.; Al-Youbi, Abdulrahman O.; Ng, Seik Weng
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract In the title compound, C22H14BrN3, the fused-ring system is buckled owing to the ethyl­ene linkage in the central ring; the two flanking aromatic rings are twisted by 25.9 (1) ° with respect to each other. The phenyl ring is twisted by 77.0 (1)° relative to the amino- and cyano-bearing aromatic ring. In the crystal, adjacent mol­ecules are linked by two N–H⋯N hydrogen bonds,...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3201339
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by Asiri, Abdullah M.; Al-Youbi, Abdulrahman O.; Faidallah, Hassan M.; Ng, Seik Weng; Tiekink, Edward R. T.
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 67 . Abstract In the title compound, C23H17N3O, significant deviations from planarity are evidenced. This is quanti­fied in the dihedral angles formed between the central amino-benzene ring and the benzene rings of the meth­oxy­benzene [67.93 (8)°] and 1,2-dihydro­naphthalene [28.27 (8)°] residues. In the crystal the amino-H atoms form hydrogen bonds to the meth­oxy-O atom and to one of the...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3200821
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by Asiri, Abdullah M.; Arshad, Muhammad Nadeem; Obaid, Abdullah Y.; Mustafa, Ghulam
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This article is from Acta Crystallographica Section E: Structure Reports Online , volume 69 . Abstract In the title hydrate, C13H10N4O2S·H2O, the dihedral angles between the central pyrazole ring and its pendant phenyl and thia­diazole rings are 9.93 (8) and 4.56 (7)°, respectively. In the crystal, the components are linked by N—H⋯O, O—H⋯N and O—H⋯O hydrogen bonds, generating [100] chains incorporating R44(10) loops. A weak C—H⋯O inter­action helps to consolidate the...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3648319
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by Khan, Sher Bahadar; Rahman, Mohammed M; Marwani, Hadi M; Asiri, Abdullah M; Alamry, Khalid A
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This article is from Nanoscale Research Letters , volume 8 . Abstract Zinc oxide nanosheet is assessed as a selective adsorbent for the detection and adsorption of cadmium using simple eco-friendly extraction method. Pure zinc oxide nanosheet powders were characterized using field emission scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. The zinc oxide nanosheets were applied to...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3848733