scholarly journals Diethyl (E)-2,3-bis[(E)-(2-methyl-2-phenylhydrazin-1-ylidene)methyl]but-2-enedioate

2014 ◽  
Vol 70 (6) ◽  
pp. o723-o723
Author(s):  
Peng Liu ◽  
Libin Yuan ◽  
Xiuqing Song ◽  
Hong Yan
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Phenyl Ring ◽  
Side Chain ◽  
Dihedral Angles ◽  
Inversion Symmetry ◽  
Compound C ◽  
Corrugated Sheets ◽  
Major Conformation

The complete molecule of the title compound, C24H28N4O4, is generated by crystallographic inversion symmetry. The ethyl side chain is disordered over two sets of sites in a 0.57 (4):0.43 (4) ratio. The dihedral angles between the methylidene group and the phenyl ring and ester side chain (major conformation) are 7.61 (8) and 86.95 (8)°, respectively. In the crystal, molecules are linkedviaC—H...O hydrogen bonds, forming corrugated sheets lying parallel to (010).

(E)-4-[4-(4-Chlorobenzyloxy)-3-ethoxybenzylideneamino]-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one

2006 ◽  
Vol 62 (7) ◽  
pp. o2834-o2835 ◽  
Author(s):  
Wen-Jun Zhang ◽  
Zhong-Yu Duan ◽  
Xin Zhao
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Phenyl Ring ◽  
Dihedral Angles ◽  
Compound C ◽  
Centrosymmetric Dimers

The title compound, C27H26ClN3O3, was prepared by reacting 4-amino-1,5-dimethyl-2-phenylpyrazol-3-one and 4-(4-chlorobenzyloxy)-3-ethoxybenzaldehyde. The central ethylvanillin group makes dihedral angles of 63.00 (11), 31.83 (7) and 74.47 (8)° with the chlorobenzene ring, the pyrazolone ring and the terminal phenyl ring, respectively. Packing is stabilized by intermolecular C—H...O hydrogen bonds that form centrosymmetric dimers.

scholarly journals 3-(4-Fluorobenzoyl)-4-(4-fluorophenyl)-4-hydroxy-2,6-diphenylcyclohexane-1,1-dicarbonitrile

2014 ◽  
Vol 70 (6) ◽  
pp. o736-o737
Author(s):  
B. Narayana ◽  
M Sapnakumari ◽  
Balladka K. Sarojini ◽  
Jerry P. Jasinski
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Phenyl Ring ◽  
Chair Conformation ◽  
Dihedral Angles ◽  
Compound C ◽  
Phenyl Rings ◽  
Ring Motif

In the title compound, C33H24F2N2O2, the cyclohexane ring adopts a slightly distorted chair conformation. The dihedral angle between the planes of the phenyl rings is 71.80 (9)°, while the planes of the fluorophenyl and fluorobenzoyl rings are inclined to one another by 31.04 (10)°. The dihedral angles between the planes of the phenyl ring adjacent to the 4-hydroxy group and those of the the fluorophenyl and fluorobenzoyl rings are 51.64 (10) and 34.31 (10)°, respectively, while the corresponding angles for the phenyl ring adjacent to the 3-(4-fluorobenzoyl) group are 57.51 (9) and 85.02 (10)°, respectively. An intramolecular O—H...O hydrogen bond generates anS(6) ring motif. In the crystal, molecules are linkedviapairs of O—H...N hydrogen bonds, forming inversion dimers. The dimers are linkedviaC—H...N and C—H...O hydrogen bonds, forming chains along thec-axis direction. C—H...F hydrogen bonds link the chains into sheets lying parallel to thebcplane.

scholarly journals 3-Benzyl-7-(2,4-dichlorophenyl)-4H-1,3,4-thiadiazolo[2,3-c][1,2,4]triazin-4-one

2012 ◽  
Vol 68 (6) ◽  
pp. o1736-o1737
Author(s):  
Hoong-Kun Fun ◽  
Suhana Arshad ◽  
B. K. Sarojini ◽  
U. A. Imran ◽  
B.G. Krishna
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Phenyl Ring ◽  
Ring System ◽  
Dihedral Angles ◽  
Maximum Deviation ◽  
Triazine Ring ◽  
Compound C ◽  
Graph Set

In the title compound, C17H10Cl2N4OS, the phenyl ring and the H atoms attached to the adjacent C atom are disordered over two positions, with refined site occupancies of 0.509 (8) and 0.491 (8). The planar 4H-1,3,4-thiadiazolo[2,3-c][1,2,4]triazine ring system [maximum deviation = 0.048 (3) Å] forms dihedral angles of 76.9 (5), 74.9 (5) and 9.88 (12)°, respectively, with the major and minor parts of the disordered phenyl ring and with the dichloro-substituted benzene ring. In the crystal, pairs of C—H...O hydrogen bonds link the molecules, forming inversion dimers with an R 2 2(18) graph-set motif. A short S...N contact of 2.801 (3) Å is observed between the dimers.

scholarly journals N-(6-Chloro-1-methyl-1H-imidazo[4,5-c]pyridin-4-yl)benzenesulfonamide

2014 ◽  
Vol 70 (4) ◽  
pp. o445-o445
Author(s):  
Venkatesh B. Devaru ◽  
K. S. Katagi ◽  
O. Kotresh ◽  
H. K. Arunkashi ◽  
H. C. Devarajegowda
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Phenyl Ring ◽  
Three Dimensional ◽  
Dihedral Angles ◽  
Stacking Interactions ◽  
Asymmetric Unit ◽  
Compound C ◽  
Dimensional Network ◽  
Centroid Distance

The asymmetric unit of the title compound, C13H11ClN4O2S, contains two molecules (AandB), in which the dihedral angles between the 1H-imidazo[4,5-c]pyridine system and terminal phenyl ring are 80.83 (10) and 62.34 (1)°. In the crystal,A–Bdimers are linked by pairs of N—H...N hydrogen bonds, which generateR22(10) loops. The dimers are linked by C—H...O and C—H...Cl interactions, generating a three-dimensional network. Aromatic π–π stacking interactions [shortest centroid–centroid distance = 3.5211 (12) Å] are also observed.

scholarly journals Crystal structure of 2-[(E)-2-(2-chlorobenzylidene)hydrazin-1-yl]-4-phenyl-1,3-thiazole

2014 ◽  
Vol 70 (9) ◽  
pp. o907-o908 ◽  
Author(s):  
Joel T. Mague ◽  
Shaaban K. Mohamed ◽  
Mehmet Akkurt ◽  
Alaa A. Hassan ◽  
Mustafa R. Albayati
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Phenyl Ring ◽  
Thiazole Ring ◽  
Dihedral Angles ◽  
Asymmetric Unit ◽  
Compound C ◽  
Independent Molecules ◽  
Supramolecular Chains

The asymmetric unit of the title compound, C16H12ClN3S, contains two independent molecules whose conformations differ primarily in the orientations of the phenyl and chlorobenzene rings with respect to the thiazole ring. In the first molecule, the dihedral angles are 3.0 (1) and 9.2 (1)°, respectively, for the phenyl ring and the chlorobenzene ring, while in the second molecule, the corresponding angles are 18.6 (1) and 23.4 (1)°. In the crystal, the two independent molecules are associatedviacomplementary N—H...N hydrogen bonds into a dimer. These dimers are associated through weak C—H...Cl and C—H...S interactions into supramolecular chains propagating along thea-axis direction.

scholarly journals 2-(2-Chloro-8-methylquinolin-3-yl)-4-phenyl-1,2-dihydroquinazoline

2013 ◽  
Vol 69 (11) ◽  
pp. o1719-o1720
Author(s):  
Chamseddine Derabli ◽  
Raouf Boulcina ◽  
Sofiane Bouacida ◽  
Hocine Merazig ◽  
Abdelmadjid Debache
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Phenyl Ring ◽  
Crystal Packing ◽  
Dihedral Angles ◽  
Compound C ◽  
Centroid Distance ◽  
Benzene Rings ◽  
Phenyl Rings

In the title compound, C24H18ClN3, the dihydroquinazoline and methyl-substituted quinoline benzene rings make a dihedral angle of 78.18 (4)° and form dihedral angles of 45.91 (5) and 79.80 (4)°, respectively, with the phenyl ring. The dihedral angle between the phenyl ring of dihydroquinazoline and the methyl-substituted benzene ring of quinoline is 78.18 (4)°. The crystal packing can be described as crossed layers parallel to the (011) and (0-11) planes. The structure features N—H...N hydrogen bonds and π–π interactions [centroid–centroid distance between phenyl rings = 3.7301 (9) Å].

scholarly journals 1-Cyclopropyl-2-(2-fluorophenyl)-5-(4-fluorophenyl)-3-phenylpentane-1,5-dione

2013 ◽  
Vol 69 (2) ◽  
pp. o215-o215
Author(s):  
Thothadri Srinivasan ◽  
Govindaraj Senthilkumar ◽  
Haridoss Manikandan ◽  
Mannathusamy Gopalakrishanan ◽  
Devadasan Velmurugan
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Phenyl Ring ◽  
Cyclopropane Ring ◽  
Dihedral Angles ◽  
Axis Direction ◽  
Compound C

In the title compound, C26H22F2O2, the cyclopropane ring makes dihedral angles of 47.6 (2), 51.3 (2) and 63.9 (2)° with the 2-fluoro-substituted phenyl ring, the unsubstituted phenyl ring and the 4-fluoro-substituted phenyl ring, respectively. There is a short C—H...F contact in the molecule. In the crystal, weak C—H...F hydrogen bonds lead to chains of molecules extending along theb-axis direction.

scholarly journals 5-(2-Methylfuran-3-yl)-N-phenyl-1,3,4-oxadiazol-2-amine

IUCrData ◽  
2016 ◽  
Vol 1 (11) ◽  
Author(s):  
Santosh Paswan ◽  
Manoj K. Bharty ◽  
Sushil K. Gupta ◽  
Ray J. Butcher ◽  
Jerry P. Jasinski
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Phenyl Ring ◽  
Furan Ring ◽  
Three Dimensional ◽  
Dihedral Angles ◽  
Π Interactions ◽  
Compound C ◽  
Dimensional Network

In the title compound, C13H11N3O2, the furan ring is disordered over two orientations, with occupancies of 0.902 (2) and 0.098 (2). The dihedral angles between the central oxadiazole ring and the pendant phenyl ring and the furan ring (major disorder component) are 10.12 (11) and 1.76 (15)°, respectively. A short intramolecular C—H...O contact generates anS(6) ring. In the crystal, inversion dimers linked by pairs of N—H...N hydrogen bonds generateR22(8) loops. The dimers are linked by C—H...π and π–π interactions [range of centroid–centroid distances = 3.301 (7)–3.689 (1) Å], generating a three-dimensional network.

scholarly journals Crystal structure of 1-benzyl-2-hydroxy-5-oxopyrrolidin-3-yl acetate

2015 ◽  
Vol 71 (8) ◽  
pp. o582-o583 ◽  
Author(s):  
Ignez Caracelli ◽  
Julio Zukerman-Schpector ◽  
Hélio A. Stefani ◽  
Bakhat Ali ◽  
Edward R. T. Tiekink
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Phenyl Ring ◽  
Three Dimensional ◽  
Acetate Group ◽  
Dihedral Angles ◽  
Central Ring ◽  
Compound C ◽  
Supramolecular Chains

In the title compound, C13H15NO4, the oxopyrrolidin-3-yl ring has an envelope conformation, with the C atom bearing the acetate group being the flap. The acetate and phenyl groups are inclined with respect to the central ring, forming dihedral angles of 50.20 (12) and 87.40 (9)°, respectively, with the least-squares plane through the ring. The dihedral angle between the acetate group and the phenyl ring is 63.22 (8)°, indicating a twisted conformation in the molecule. In the crystal, supramolecular chains along thebaxis are formed by (hydroxy)O—H...O(ring carbonyl) hydrogen bonds. The chains are consolidated into the three-dimensional architecture by C—H...O interactions.

scholarly journals 2-(2H-Indazol-2-yl)-1-phenylethanone

2013 ◽  
Vol 69 (2) ◽  
pp. o184-o184 ◽  
Author(s):  
Özden Özel Güven ◽  
Gökhan Türk ◽  
Philip D. F. Adler ◽  
Simon J. Coles ◽  
Tuncer Hökelek
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Phenyl Ring ◽  
Dihedral Angles ◽  
Asymmetric Unit ◽  
Π Interactions ◽  
Compound C ◽  
Independent Molecules

The asymmetric unit of the title compound, C15H12N2O, contains two independent molecules with different conformations, the phenyl ring and indazole mean plane in the two molecules forming dihedral angles of 50.82 (5) and 89.29 (6)°. In the crystal, weak C—H...O and C–H...N hydrogen bonds and C—H...π interactions consolidate the packing.

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