oalib
Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Acetoguanamine N,N-dimethylformamide solvate
Gustavo Portalone
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808023842
Abstract: The structure of acetoguanamine (or 2,4-diamino-6-methyl-1,3,5-triazine) has been determined as the N,N-dimethylformamide solvate, C4H7N5·C3H7NO. The molecular components are associated in the crystal structure to form ribbons stabilized by three N—H...N and one N—H...O hydrogen bonds which involve NH groups as donors and the N atoms of the heterocyclic ring and the carbonyl O atom of the solvent as acceptors.
1-(2,6-Dichlorobenzoyl)-3-(2,3,5,6-tetrachlorophenyl)thiourea trichloromethane hemisolvate
M. Khawar Rauf,Michael Bolte,Saeed Anwar
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809000051
Abstract: The title compound, C14H6Cl6N2OS·0.5CHCl3, crystallizes with four 1-(2,6-dichlorobenzoyl)-3-(2,3,5,6-tetrachlorophenyl)thiourea molecules and two trichloromethane molecules in the asymmetric unit. The thiourea molecules exist in the solid state in their thione forms with typical thiourea C—S and C—O bonds lengths, as well as shortened C—N bonds. The —NH—C(=S)—NH—C(=O)— plane is almost perpendicular to the benzene ring in each thiourea molecule. Intramolecular N—H...O hydrogen bonds stabilize the molecular conformation and intermolecular N—H...S hydrogen bonds stabilize the packing arrangement.
Cyclo(l-tyrosyl-l-tryptophanyl) dimethylformamide solvate  [cached]
Carl Henrik G?rbitz,Lars Male Hartviksen
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808000640
Abstract: The structure of the title compound [systematic name: (3S,6S)-3-(4-hydroxybenzyl)-6-(1H-indol-3-ylmethyl)piperazine-2,5-dione dimethylformamide solvate], C20H19N3O3·C3H7NO, contains hydrogen-bonded tapes typical for diketopiperazines. The structure is stabilized by strong intermolecular interactions of the types O—H...O and N—H...O involving the dipeptide and the solvent molecules. The absolute configuration was known from the starting materials.
1-(4-Chlorophenyl)-3-(2,4-dichlorobenzoyl)thiourea  [cached]
M. Khawar Rauf,Michael Bolte,Amin Badshah
Acta Crystallographica Section E , 2009, DOI: 10.1107/s160053680900004x
Abstract: The title compound, C14H9Cl3N2OS, has bond lengths and angles which are quite typical for thiourea compounds of this class. The molecule exists in the solid state in its thione form with typical thiourea C=S and C=O bond lengths, as well as shortened C—N bonds. An intramolecular N—H...O hydrogen bond stabilizes the molecular conformation. Intermolecular N—H...S hydrogen bonds link the molecules to form centrosymmetric dimers.
1-(2,6-Dichlorobenzoyl)-3-(3,5-dichlorophenyl)thiourea  [cached]
M. Khawar Rauf,Michael Bolte,Amin Badshah
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536808042736
Abstract: The crystal structure of the title compound, C14H8Cl4N2OS, is composed of discrete molecules with bond lengths and angles quite typical for thiourea compounds of this class. The plane containing the central SONNCC atom set subtends a dihedral angle of 31.47 (3)° with the benzene ring. An intramolecular N—H...O hydrogen bond stabilizes the molecular conformation and the molecules form centrosymmetric dimers via intermolecular N—H...S hydrogen bonds.
1-(2,6-Dichlorobenzoyl)-3-(3-methoxyphenyl)thiourea  [cached]
M. Khawar Rauf,Michael Bolte,Amin Badshah
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536808041263
Abstract: The two aromatic rings in the title compound, C15H12Cl2N2O2S, enclose a dihedral angle of 37.49 (6)°. The molecule exists in the solid state in its thione form with typical thiourea C—S and C—O bonds lengths, as well as shortened C—N bonds. An intramolecular N—H...O hydrogen bond stabilizes the molecular conformation. In the crystal, molecules are connected by N—H...O and N—H...S hydrogen bonds, forming chains running along the a axis.
1-(3-Chlorophenyl)-3-(2,6-dichlorobenzoyl)thiourea
M. Khawar Rauf,Michael Bolte,Abdur Rauf
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536808043444
Abstract: The structure of the title compound, C14H9Cl3N2OS, is composed of discrete molecules with bond lengths and angles quite typical for thiourea compounds of this class. The plane containing the thiocarbonyl and carbonyl groups subtends dihedral angles of 48.19 (3) and 87.51 (3)° with the planes formed by the 3-chloro and 2,6-dichlorophenyl rings, respectively; the dihedral angle between the two benzene ring planes is 45.32 (3)°. An intramolecular N—H...O hydrogen bond stabilizes the molecular conformation and the molecules form intermolecular N—H...S and N—H...O hydrogen bonds, generating a sheet along the a axis.
1-(4-Nitrobenzoyl)-3-(4-nitrophenyl)thiourea acetone hemisolvate  [cached]
Liang Xian,Lujuan Cui,Ming Cheng
Acta Crystallographica Section E , 2008, DOI: 10.1107/s160053680803359x
Abstract: In the title compound, C14H10N4O5S·0.5C3H6O, the nitrobenzoyl and nitrophenyl groups have trans and cis configurations, respectively, with respect to the thiourea S atom. The molecular conformation is stabilized by intramolecular N—H...O and C—H...S hydrogen bonds. The acetone solvent molecule possesses a crystallographically imposed twofold axis. In the crystal packing, thiourea molecules are linked by intermolecular C—H...O hydrogen-bond interactions to form chains running parallel to the c axis. The chains are further bridged via N—H...O and C—H...O hydrogen bonds involving the acetone molecules.
2,2′-(Biphenyl-4,4′-diyldioxy)diacetic acid N,N-dimethylformamide solvate  [cached]
Yu-Juan Cao
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809025914
Abstract: In the crystal struture of the title compound, C16H14O6·C3H7NO, the two crystallographically independent benzene rings are coplanar [dihedral angle = 1.00 (2)°]. The crystal structure is stabilized by O—H...O hydrogen bonds between the diacid and the solvate dimethylformamide molecule, resulting in the formation of a zigzag chain structure extending parallel to [001].
cis-Bis[(1-adamantylmethyl)amine-κN]dichloridoplatinum(II) N,N-dimethylformamide solvate
Fernande D. Rochon,Christian Tessier
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809037982
Abstract: The asymmetric unit of the title compound {systematic name: cis-dichloridobis[(3,7-dimethylbicyclo[3.3.1]non-1-ylmethyl)amine-κN]platinum(II) N,N-dimethylformamide solvate}, [PtCl2(C11H19N)2]·C3H7NO, consists of two metrically similar Pt complexes and two dimethylformamide solvent molecules. Each PtII center is coordinated by the amine groups of two (1-adamantylmethyl)amine ligands and two Cl atoms in a cis-square-planar arrangement. The PtII centers lie slightly outside [0.031 (4) and 0.038 (4) ] the coordination planes. The N—Pt—N and Cl—Pt—Cl angles [92.1 (4)–92.30 (11)°] are slightly more open than the N—Pt—Cl angles [87.3 (3)–88.3 (3)°]. N—H...O and N—H...Cl intermolecular hydrogen bonds are observed, forming two discrete pairs of complexes and solvent molecules.
Page 1 /100
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.