scholarly journals (E)-4-[(4-Diethylamino-2-hydroxybenzylidene)amino]benzoic acid

2012 ◽  
Vol 68 (4) ◽  
pp. o1036-o1036 ◽  
Author(s):  
Hadi Kargar ◽  
Zahra Sharafi ◽  
Reza Kia ◽  
Muhammad Nawaz Tahir
Keyword(s):  
Hydrogen Bond ◽  
Schiff Base ◽  
Hydrogen Bonds ◽  
Benzoic Acid ◽  
Schiff Base Ligand ◽  
Site Occupancy ◽  
Compound C ◽  
Benzene Rings ◽  
Ring Motif ◽  
Amino Benzoic Acid

In the title compound, C18H20N2O3, a potential bidentateN,O-donor Schiff base ligand, the benzene rings are inclined at an angle of 12.25 (19)°. The molecule has anEconformation about the C=N bond. One of the ethyl groups is disordered over two positions, with a refined site-occupancy ratio of 0.55 (1):0.45 (1). An intramolecular O—H...N hydrogen bond makes anS(6) ring motif. In the crystal, pairs of O—H...O hydrogen bonds link molecules, forming inversion dimers withR22(8) ring motifs.

scholarly journals (E)-3-[(3-Ethoxy-2-hydroxybenzylidene)amino]benzoic acid

2012 ◽  
Vol 68 (4) ◽  
pp. o1035-o1035
Author(s):  
Hadi Kargar ◽  
Zahra Sharafi ◽  
Reza Kia ◽  
Muhammad Nawaz Tahir
Keyword(s):  
Hydrogen Bond ◽  
Schiff Base ◽  
Hydrogen Bonds ◽  
Benzoic Acid ◽  
Schiff Base Ligand ◽  
Title Compound ◽  
Compound C ◽  
Benzene Rings ◽  
Ring Motif ◽  
Amino Benzoic Acid

In the title compound, C16H15NO4, a potential bidentateN,O-donor Schiff base ligand, the benzene rings are inclined to one another by 4.24 (12)°. The molecule has anEconformation about the C=N bond. An intramolecular O—H...N hydrogen bond makes anS(6) ring motif. In the crystal, pairs of O—H...O hydrogen bonds link the molecules, forming inversion dimers withR22(8) ring motifs. These dimers are further connected by C—H...O interactions, forming a sheet in (104). There is also a C—H...π interaction present involving neighbouring molecules.

scholarly journals (E)-3-[(2-Hydroxy-3-methoxybenzylidene)amino]benzoic acid

2012 ◽  
Vol 68 (4) ◽  
pp. o1067-o1067 ◽  
Author(s):  
Hadi Kargar ◽  
Zahra Sharafi ◽  
Reza Kia ◽  
Safoora Ghelenji ◽  
Muhammad Nawaz Tahir
Keyword(s):  
Hydrogen Bonds ◽  
Benzoic Acid ◽  
Dihedral Angle ◽  
Title Compound ◽  
Crystal Packing ◽  
Site Occupancy ◽  
Compound C ◽  
Benzene Rings ◽  
Centrosymmetric Dimers ◽  
Amino Benzoic Acid

In the title compound, C15H13NO4, the dihedral angle between the substituted benzene rings is 9.9 (8)°. Part of the molecule (the salicylaldimine segment) is disordered over two sets of sites, with a refined site-occupancy ratio of 0.550 (14):0.450 (14). Intramolecular O—H...N hydrogen bonds formS(6) ring motifs. In the crystal, pairs of O—H...O hydrogen bonds link molecules into centrosymmetric dimers withR22(8) ring motifs. The crystal packing also features C—H...π interactions.

scholarly journals Crystal structure of 2-methyl-N-{[2-(pyridin-2-yl)ethyl]carbamothioyl}benzamide

2015 ◽  
Vol 71 (9) ◽  
pp. o636-o636
Author(s):  
Nadiah Ameram ◽  
Farook Adam
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Thiourea Derivative ◽  
Π Interactions ◽  
Compound C ◽  
Benzene Rings ◽  
Ring Motif

In the title compound, C16H17N3OS, a benzoyl thiourea derivative, the planes of the pyridine and benzene rings are inclined to one another by 66.54 (9)°. There is an intramolecular N—H...O hydrogen bond present forming anS(6) ring motif. In the crystal, molecules are linkedviapairs of N—H...N hydrogen bonds, forming inversion dimers, which are reinforced by pairs of C—H...S hydrogen bonds. The dimers are linkedviaC—H...π interactions, forming ribbons along [010].

scholarly journals 2-(2,3-Dimethylanilino)benzohydrazide

2012 ◽  
Vol 68 (8) ◽  
pp. o2527-o2528 ◽  
Author(s):  
Hoong-Kun Fun ◽  
Tze Shyang Chia ◽  
Tilal Elsaman ◽  
Mohamed I. Attia ◽  
Hatem A. Abdel-Aziz
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Crystal Packing ◽  
Compound C ◽  
Benzene Rings ◽  
Common Plane ◽  
Ring Motif

In the title compound, C15H17N3O, the dihedral angle between the benzene rings is 58.05 (9)°. The non-H atoms of the hydrazide group lie in a common plane (r.m.s. deviation = 0.0006 Å) and are close to coplanar with their attached benzene ring [dihedral angle = 8.02 (9)°]. An intramolecular N—H...O hydrogen bond generates anS(6) ring motif in the molecule, and a short intramolecular contact (H...H = 1.88 Å) is also observed. In the crystal, molecules are linked by pairs of N—H...N hydrogen bonds into inversion dimers. The crystal packing also features C—H...π interactions.

scholarly journals N′-(3,5-Dichloro-2-hydroxybenzylidene)-4-(dimethylamino)benzohydrazide methanol monosolvate

2012 ◽  
Vol 68 (4) ◽  
pp. o1042-o1042 ◽  
Author(s):  
Huanzhi Xu ◽  
Jingya Sun
Keyword(s):  
Hydrogen Bond ◽  
Schiff Base ◽  
Hydrogen Bonds ◽  
Least Squares ◽  
Dihedral Angle ◽  
Title Compound ◽  
Mean Deviation ◽  
Compound C ◽  
Benzene Rings

The title compound, C16H15Cl2N3O2·CH3OH, a Schiff base molecule, is prepared by the reaction of 3,5-dichlorosalicylaldehyde with 4-dimethylaminobenzohydrazide in methanol. The Schiff base molecule is approximately planar, with a mean deviation from the least-squares plane defined by the non-H atoms of 0.0452 (3) Å, and with a dihedral angle between the benzene rings of 4.2 (3)°. This planarity is assisted by the formation of an intramolecular O—H...N hydrogen bond. In the crystal, adjacent Schiff base molecules are linked by two methanol molecules through N—H...O and O—H...O hydrogen bonds, forming dimers.

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-(3-Bromopropyloxy)-1-hydroxy-9,10-anthraquinone

IUCrData ◽  
2016 ◽  
Vol 1 (5) ◽  
Author(s):  
Natsumi Ohira ◽  
Munenori Takehara ◽  
Yoshinori Inoue ◽  
Chitoshi Kitamura
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Ring System ◽  
Side Chain ◽  
Hydrogen Bond Donor ◽  
Torsion Angles ◽  
Compound C ◽  
Benzene Rings ◽  
Ring Motif

In the molecule of the title compound, C17H13BrO4, the anthraquinone ring system is slightly bent, with a dihedral angle of 169.99 (7)° between the planes of the two benzene rings. The side chain (O—C—C—C—Br) has agauche–gaucheconformation, as indicated by the O—C—C—C and C—C—C—Br torsion angles of −66.9 (2) and −65.8 (2)°, respectively. In addition, there is an intramolecular O—H...O hydrogen bond enclosing anS(6) ring motif. The hydrogen-bond donor is bifurcated; in the crystal, a pair of O—H...O hydrogen bonds connects two molecules, forming an inversion dimer with anR22(12) ring motif.

scholarly journals N-(4-Chlorophenyl)-2,2-diphenylacetamide

2012 ◽  
Vol 68 (8) ◽  
pp. o2556-o2557
Author(s):  
Hoong-Kun Fun ◽  
Wan-Sin Loh ◽  
Prakash S Nayak ◽  
B. Narayana ◽  
B. K. Sarojini
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Crystal Packing ◽  
Dihedral Angles ◽  
Compound C ◽  
Benzene Rings ◽  
Ring Motif

In the title compound, C20H16ClNO, anS(6) ring motif is formedviaan intramolecular C—H...O hydrogen bond. The chloro-substituted benzene ring is almost perpendicular to the benzene rings, forming dihedral angles of 87.33 (9) and 88.69 (9)°. The dihedral angle between the benzene rings is 87.17 (9)°. In the crystal, molecules are linked into chains parallel to thecaxis by intermolecular N—H...O hydrogen bonds. The crystal packing also features weak C—H...π interactions involving the chloro-substituted ring.

scholarly journals (E)-2-{[4-(Dimethylamino)benzylidene]amino}-5-nitrophenol

2014 ◽  
Vol 70 (5) ◽  
pp. o598-o599 ◽  
Author(s):  
Yousef Hijji ◽  
Ray J. Butcher ◽  
Jerry P. Jasinski
Keyword(s):  
Hydrogen Bond ◽  
Schiff Base ◽  
Hydrogen Bonds ◽  
Nitro Group ◽  
Asymmetric Unit ◽  
Compound C ◽  
Benzene Rings ◽  
Schiff Base Compound ◽  
Imine Bond ◽  
Base Compound

The title Schiff base compound, C15H15N3O3, crystallizes with two molecules (AandB) in the asymmetric unit. Each molecule adopts anEconformation around the C= N imine bond. The two molecules have minor differences in their conformations. In moleculeA, the dihedral angle between the nitro group and its benzene ring is 2.1 (2)° and that between the two benzene rings is 0.88 (7)°, while the corresponding angles for moleculeBare 5.7 (1) and 2.45 (6)°, respectively. In each molecule, there is an intramolecular O—H...N hydrogen bond. In the crystal, inversion-related molecules are linkedviaO—H...O hydrogen bonds formingA–AandB–Bdimers. These dimers are linkedviaC—H...O hydrogen bonds involving the nitro O atoms, formingA–A–AandB–B–Bslabs that lie parallel to one another and to (010).

scholarly journals (E)-N-(4-{[1-(Prop-2-en-1-yl)-1H-1,2,3-triazol-4-yl]methoxy}benzylidene)morpholin-4-amine

2014 ◽  
Vol 70 (3) ◽  
pp. o289-o290 ◽  
Author(s):  
Mehmet Akkurt ◽  
Aliasghar Jarrahpour ◽  
Mehdi Mohammadi Chermahini ◽  
Pezhman Shiri ◽  
Namık Özdemir
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Site Occupancy ◽  
Dihedral Angles ◽  
Stacking Interactions ◽  
Independent Molecule ◽  
Asymmetric Unit ◽  
Compound C ◽  
Benzene Rings ◽  
Independent Molecules

The asymmetric unit of the title compound, C17H21N5O2, contains two crystallographically independent molecules, which are linked by a C—H...N hydrogen bond. The morpholine rings of both molecules adopt distorted chair conformations. The dihedral angles between the triazole and benzene rings are 12.8 (3)° in the first independent molecule in which the –N=C– group between the morpholine and benzene rings is disordered [site-occupancy ratio = 0.576 (7):0.424 (7)] and 88.1 (2)° in the second independent molecule. In the crystal, molecules are linked by C—H...N hydrogen bonds along the [100] direction. In addition, one weak C—H...π interaction and two weak π–π stacking interactions [centroid–centroid distances = 3.840 (3) and 3.823 (2) Å] between the triazole rings of adjacent molecules are observed. The atoms of the terminal propenyl groups in both molecules are disordered over two sets of sites [site-occupancy ratios = 0.691 (10):0.309 (10) and 0.705 (15):0.295 (15)].

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