scholarly journals N′-(5-Chloro-2-hydroxybenzylidene)-4-methoxybenzohydrazide

2012 ◽  
Vol 68 (4) ◽  
pp. o1079-o1079 ◽  
Author(s):  
Yao Tan
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Relative Orientation ◽  
Dihedral Angles ◽  
Asymmetric Unit ◽  
Compound C ◽  
Principal Difference ◽  
Benzene Rings

The asymmetric unit of the title compound, C15H13ClN2O3, contains two independent hydrazone molecules. Each molecule adopts anEconfiguration with respect to the methylidene unit and forms an intramolecular O—H...N hydrogen bond. The principal difference between the two unique molecules is the relative orientation of the two benzene rings, the dihedral angles between them being 4.0 (3) and 65.9 (3)°, respectively. In the crystal, molecules are linked through N—H...O hydrogen bonds, forming chains running along thecaxis.

scholarly journals 2,4-Dibromo-6-[(2-hydroxy-5-methylanilino)methylidene]cyclohexa-2,4-dienone

IUCrData ◽  
2018 ◽  
Vol 3 (3) ◽  
Author(s):  
Tarun Kumar Pal ◽  
Md Dulal Hossain ◽  
Md Chanmiya Sheikh ◽  
Ryuta Miyatake ◽  
Md Ashraful Alam
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Dihedral Angles ◽  
Asymmetric Unit ◽  
Compound C ◽  
Benzene Rings ◽  
Independent Molecules ◽  
Ring Motif

The new bromo-substituted title compound, C14H11Br2NO2, was synthesized by the condensation of 3,5-dibromosalicylaldehyde and 2-amino-4-methyl phenol. The asymmetric unit consists of two crystallographically independent molecules (AandB), which are related to each other by a pseudo-inversion centre. Both molecules are almost planar; dihedral angles between the two benzene rings are 11.40 (11)° forAand 3.05 (12)° forB. In each molecule, there is an intramolecular N—H...O hydrogen bond with anS(6) ring motif. In the crystal, two independent molecules are linked by O—H...O hydrogen bonds, forming a pseudo-inversionA–Bdimer.

scholarly journals 4-Chloro-N′-(3,5-dibromo-2-hydroxybenzylidene)benzohydrazide

2012 ◽  
Vol 68 (4) ◽  
pp. o1209-o1209
Author(s):  
Wei-Guang Zhang
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Dihedral Angles ◽  
Asymmetric Unit ◽  
Compound C ◽  
Benzene Rings ◽  
Independent Molecules

The asymmetric unit of the title compound, C14H9Br2ClN2O2, contains two independent molecules. Both molecules adopt anEconfiguration about the C=N bond. The dihedral angles between the benzene rings are 30.0 (2) and 51.6 (2)° in the two molecules. In the crystal, molecules are linked through N—H...O hydrogen bonds, forming chains along thebaxis. In addition, there is an intramolecular O—H...N hydrogen bond in each molecule.

scholarly journals 4-[(5-Bromo-2-hydroxybenzylidene)amino]-3-ethyl-1H-1,2,4-triazole-5(4H)-thione

2014 ◽  
Vol 70 (8) ◽  
pp. o881-o882
Author(s):  
Cai-Xia Yuan ◽  
Shu-Fen Lan ◽  
Xin-Yu Liu ◽  
Miao-Li Zhu
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Dihedral Angles ◽  
Asymmetric Unit ◽  
Π Interactions ◽  
Compound C ◽  
Centroid Distance ◽  
Benzene Rings ◽  
Independent Molecules

The title compound, C11H11BrN4OS, crystallized as a racemic twin with two symmetry-independent molecules in the asymmetric unit. The dihedral angles between the benzene and triazole rings of the two independent molecules are 56.41 (18) and 54.48 (18)°. An intramolecular O—H...N hydrogen bond occurs in each molecule. In the crystal, pairs of symmetry-independent molecules are linked by pairs of almost linear N—H...S hydrogen bonds, forming cyclic dimers characterized by anR22(8) motif. There are weak π–π interactions between the benzene rings of symmetry-independent molecules, with a centroid–centroid distance of 3.874 (3) Å.

scholarly journals 4-[(5-Chloro-2-hydroxybenzylidene)amino]-3-ethyl-1H-1,2,4-triazole-5(4H)-thione

2014 ◽  
Vol 70 (5) ◽  
pp. o574-o575
Author(s):  
Cai-Xia Yuan ◽  
Xu-Mei Yao ◽  
Miao-Li Zhu ◽  
Hong-Mei Zhu
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Dihedral Angles ◽  
Stacking Interactions ◽  
Asymmetric Unit ◽  
Compound C ◽  
Π Stacking ◽  
Benzene Rings

The title compound, C11H11ClN4OS, crystallizes with two molecules,AandB, in the asymmetric unit in which the dihedral angles between the triazole and benzene rings are 54.6 (3) and 56.0 (3)°. Both molecules feature an intramolecular O—H...N hydrogen bond, which generates anS(6) ring. In the crystal,A–Bdimers are linked by pairs of weak C—H...S hydrogen bonds along with π–π stacking interactions between the triazole rings [centroid–centroid separations = 3.631 (3) and 3.981 (4)Å]. N—H...S hydrogen bonds link the dimers into [100] chains, which featureR22(8) loops.

scholarly journals (E)-2-(2,3-Dimethylanilino)-N′-[2-methyl-5-(prop-1-en-2-yl)cyclohex-2-enylidene]benzohydrazide

2012 ◽  
Vol 68 (4) ◽  
pp. o1135-o1135 ◽  
Author(s):  
Mashooq A. Bhat ◽  
Hatem A. Abdel-Aziz ◽  
Hazem A. Ghabbour ◽  
Madhukar Hemamalini ◽  
Hoong-Kun Fun
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Dihedral Angles ◽  
Asymmetric Unit ◽  
Compound C ◽  
Benzene Rings ◽  
Independent Molecules

The asymmetric unit of the title compound, C25H29N3O, comprises two crystallographically independent molecules. The dihedral angles between the benzene rings in the two molecules are 59.7 (2) and 61.27 (18)°. The cyclohexene rings adopt sofa and half-chair conformations. In the crystal, molecules are connectedviaN—H...O and weak C—H...O hydrogen bonds, forming chains along theaaxis. In each molecule, there is an intramolecular N—H...O hydrogen bond.

scholarly journals Crystal structure of (E)-4-{[2-(2,4-dinitrophenyl)hydrazin-1-ylidene]methyl}-3-methyl-1-phenyl-5-(1H-pyrrol-1-yl)-1H-pyrazole

2014 ◽  
Vol 70 (12) ◽  
pp. o1246-o1247 ◽  
Author(s):  
Joel T. Mague ◽  
Shaaban K. Mohamed ◽  
Mehmet Akkurt ◽  
Hussein M. S. El-Kashef ◽  
Mustafa R. Albayati
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Pyrazole Ring ◽  
Dihedral Angles ◽  
Extended Conformation ◽  
Compound C ◽  
Benzene Rings

The title compound, C21H17N7O4, is in an `extended' conformation aided by an intramolecular N—H...O hydrogen bond. The pyrazole ring makes dihedral angles of 29.17 (6), 65.47 (4) and 9.91 (7)°, respectively, with the phenyl, pyrrole and benzene rings. In the crystal, molecules are connected by pairs of N—H...O and C—H...O hydrogen bonds, forming inversion dimers which associate into ribbons running along thebaxis through complementary C—H...O interactions.

scholarly journals N-[4-(4-Nitrophenoxy)phenyl]acetamide

2012 ◽  
Vol 68 (8) ◽  
pp. o2485-o2485 ◽  
Author(s):  
Asifa Nigar ◽  
Zareen Akhter ◽  
M. Nawaz Tahir
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Dihedral Angles ◽  
Asymmetric Unit ◽  
Π Interactions ◽  
Compound C ◽  
Benzene Rings

The asymmetric unit of the title compound, C14H12N2O4, contains two molecules that differ principally in the orientation of the acetamide substituent to the adjacent benzene ring with dihedral angles of 44.77 (7) and 19.06 (7)°. The dihedral angles between the benzene rings are 64.46 (4) and 80.84 (4)°. In the crystal, classical N—H...O hydrogen bonds formC(4) chains along [100]. These chains are interlinked by C—H...O contacts formingR22(10) rings. In the crystal, π–π interactions are observed with a distance of 3.5976 (18) Å between the centroids of the nitro-substituted benzene rings of one type of molecule.

scholarly journals 3-Methoxy-2-[5-(naphthalen-2-yl)-4,5-dihydro-1H-pyrazol-3-yl]phenol

2014 ◽  
Vol 70 (4) ◽  
pp. o464-o464 ◽  
Author(s):  
Dongsoo Koh ◽  
Yoongho Lim ◽  
Alan J. Lough
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Ring System ◽  
Dihedral Angles ◽  
Asymmetric Unit ◽  
Naphthalene Ring ◽  
Compound C ◽  
Graph Set ◽  
Independent Molecules

The asymmetric unit of the title compound, C20H18N2O2, contains two independent molecules in which the dihedral angles between the naphthalene ring system [r.m.s. deviations = 0.012 (1) and 0.015 (1) Å] and the benzene ring are 71.65 (6) and 74.51 (6)°. In the crystal, pairs of N—H...O hydrogen bonds form two independent inversion dimers with graph-set notationR22(14). In addition, each molecule contains an intramolecular O—H...N hydrogen bond with anS(6) motif.

scholarly journals 1-(2-Bromophenyl)-3-(4-chlorobutanoyl)thiourea

2012 ◽  
Vol 68 (4) ◽  
pp. o1267-o1267 ◽  
Author(s):  
Mohd Sukeri Mohd Yusof ◽  
Nur Farhana Embong ◽  
Suhana Arshad ◽  
Ibrahim Abdul Razak
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Dihedral Angles ◽  
Asymmetric Unit ◽  
Compound C ◽  
The Mean ◽  
Independent Molecules ◽  
Ring Motif

The asymmetric unit of the title compound, C11H12BrClN2OS, consists of two crystallographically independent molecules. In each molecule, the butanoylthiourea unit is nearly planar, with maximum deviations of 0.1292 (19) and 0.3352 (18) Å from the mean plane defined by nine non-H atoms, and is twisted relative to the terminal benzene ring with dihedral angles of 69.26 (7) and 82.41 (7)°. An intramolecular N—H...O hydrogen bond generates anS(6) ring motif in each butanoylthiourea unit. In the crystal, N—H...O hydrogen bonds link the two independent molecules together, forming anR22(12) ring motif. The molecules are further connected into a tape along thecaxisviaN—H...S and C—H...S hydrogen bonds.

scholarly journals 5-Methyl-1,3-diphenyl-N-(5-phenyl-1,3,4-thiadiazol-2-yl)-1H-pyrazole-4-carboxamide

2013 ◽  
Vol 69 (12) ◽  
pp. o1736-o1736
Author(s):  
Chandra ◽  
S. S. Mahesh ◽  
N. Srikantamurthy ◽  
K. B. Umesha ◽  
K. Palani ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Phenyl Group ◽  
Pyrazole Ring ◽  
Dihedral Angles ◽  
Asymmetric Unit ◽  
Compound C ◽  
Thiadiazole Ring ◽  
Dimer Linkage

The asymmetric unit of the title compound C25H19N5OS, contains two molecules,AandB. In moleculeA, the dihedral angles between the pyrazole ring and the C-bound phenyl group, the N-bound phenyl group and the thiadiazole ring are 32.30 (14), 52.25 (14) and 34.94 (12)°, respectively. The corresponding angles in moleculeBare 33.32 (14), 50.67 (15), and 70.30 (12)°, respectively. In the crystal, theAandBmolecules are linked by pairs of N—H...N hydrogen bonds, generatingR22(8) loops. This dimer linkage is reinforced by two C—H...O hydrogen bonds and one C—H...N hydrogen bond.

Sign in / Sign up

Export Citation Format

Share Document