scholarly journals 2-Chloro-N′-[(E)-(2-methoxy-1-naphthyl)methylene]benzohydrazide

2009 ◽  
Vol 65 (6) ◽  
pp. o1254-o1254
Author(s):  
Chunbao Tang
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Ring System ◽  
Compound C ◽  
Naphthyl Ring ◽  
Graph Set ◽  
Schiff Base Compound ◽  
Base Compound

In the molecule of the title Schiff base compound, C19H15ClN2O2, the dihedral angle between the benzene ring and naphthyl ring system is 77.1 (2)°. In the crystal structure, centrosymmetrically related molecules are linked into dimers through pairs of intermolecular N–H...O hydrogen bonds, generating rings of graph setR22(8).

scholarly journals 1-[(2-Anilinoethyl)iminiomethyl]-2-naphtholate

2009 ◽  
Vol 65 (6) ◽  
pp. o1400-o1400 ◽  
Author(s):  
Yu-Mei Hao
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Schiff Base ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Methanol Solution ◽  
Compound C ◽  
Schiff Base Compound ◽  
Base Compound

The title Schiff base compound, C19H18N2O, was prepared by the reaction of equimolar quantities of 2-hydroxy-1-naphthaldehyde withN-phenylethane-1,2-diamine in a methanol solution. The molecule adopts a zwitterionic conformation with the naphthyl OH group deprotonated and the imine N atom protonated. An intramolecular N—H...O hydrogen bond forms between them. The dihedral angle between the benzene ring and the naphthyl system is 86.9 (2)°. In the crystal structure, molecules are linked through intermolecular N—H...O hydrogen bonds, forming chains running along thebaxis.

3,3′-Dimethoxy-2,2′-[o-phenylenebis(nitrilomethylidyne)]diphenol

2007 ◽  
Vol 63 (11) ◽  
pp. o4462-o4462 ◽  
Author(s):  
Mohammad Hossein Habibi ◽  
Morteza Montazerozohori ◽  
Reza Mokhtari ◽  
Ross W. Harrington ◽  
William Clegg
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Methoxy Group ◽  
Dihedral Angles ◽  
Compound C ◽  
Schiff Base Compound ◽  
Phenol Ring ◽  
Base Compound

The title Schiff base compound, C19H20N2O4, was synthesized by the reaction of o-phenylenediamine with 6-methoxysalicylaldehyde. The central benzene ring makes dihedral angles of 2.78 (5) and 73.98 (5)° with the two terminal phenol rings. Each methoxy group is coplanar with the attached phenol ring. The crystal structure is stabilized by intramolecular O—H...N and intermolecular C—H...O hydrogen bonds.

scholarly journals Crystal structure of (Z)-3-benzyloxy-6-[(2-hydroxy-5-methylanilino)methylidene]cyclohexa-2,4-dien-1-one

2014 ◽  
Vol 70 (9) ◽  
pp. o957-o958 ◽  
Author(s):  
Nadir Ghichi ◽  
Ali Benosmane ◽  
Ali Benboudiaf ◽  
Hocine Merazig
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Schiff Base ◽  
Hydrogen Bonds ◽  
Membered Ring ◽  
Compound C ◽  
Schiff Base Compound ◽  
Ring Motif ◽  
Base Compound

In the title Schiff base compound, C21H19NO3, the conformation about the C=C bond isZ. The N—H group and carbonyl O atom form an intramolecular N—H...O hydrogen bond with anS(6) ring motif. The benzyloxy ring and the 2-hydroxy-5-methylphenyl ring are inclined to the central six-membered ring by 13.68 (9) and 9.13 (8)°, respectively, and to one another by 21.95 (9)°. In the crystal, molecules are linked by O—H...O hydrogen bonds, forming helical chains along [010].

scholarly journals 1-[(E)-(3-Hydroxy-4-methoxybenzylidene)amino]-3-methylthiourea

IUCrData ◽  
2016 ◽  
Vol 1 (10) ◽  
Author(s):  
Md. Azharul Arafath ◽  
Farook Adam ◽  
Mohd. R. Razali
Keyword(s):  
Schiff Base ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Intramolecular Hydrogen Bonds ◽  
Compound C ◽  
Schiff Base Compound ◽  
Intramolecular Hydrogen ◽  
Dimeric Aggregates ◽  
Base Compound

In the title thiosemicarbazone Schiff base compound, C10H13N3O2S, the dihedral angle between the benzene ring and methyl carbothioamide side arm was found to be 17.4 (4)°. The presence of two intramolecular hydrogen bonds is noted, namely hydroxy-O—H...O(methoxy) and amine-N—H...N(imine). In the crystal, pairwise amine-N—H...S hydrogen bonds give rise to centrosymmetric {...HNCS}2 synthons, which lead to dimeric aggregates.

scholarly journals Crystal structure of (E)-4-methyl-N-{2-[2-(4-nitrobenzylidene)hydrazin-1-yl]-2-oxoethyl}benzenesulfonamideN,N-dimethylformamide monosolvate

2017 ◽  
Vol 73 (11) ◽  
pp. 1683-1686 ◽  
Author(s):  
H. Purandara ◽  
Sabine Foro ◽  
B. Thimme Gowda
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Three Dimensional ◽  
Aromatic Rings ◽  
Compound C ◽  
Dimensional Network ◽  
Graph Set ◽  
Schiff Base Compound ◽  
Normal Bond ◽  
Base Compound

The molecule of the title Schiff base compound, C16H16N4O5S·C3H7NO, displays atransconformation with respect to the C=N double bond. The C—N and N—N bonds are relatively short compared to their normal bond lengths, indicating some degree of delocalization in the molecule. The molecule is bent at the S atom, with an S—N—C—C torsion angle of 164.48 (11)°. The dihedral angle between the two aromatic rings is 84.594 (7)°. Intermolecular N—H...O and C —H...O hydrogen bonds connect centrosymmetrically related molecules into dimers forming rings ofR33(11) andR22(10) graph-set motif stacked along theaaxis into a columnar arrangement. The molecular columns are further linked into a three-dimensional network by C—H...π interactions.

scholarly journals Crystal structure of (Z)-1-(3,4-dichlorophenyl)-3-methyl-4-[(naphthalen-1-ylamino)(p-tolyl)methylidene]-1H-pyrazol-5(4H)-one

2014 ◽  
Vol 70 (9) ◽  
pp. o955-o956 ◽  
Author(s):  
Naresh Sharma ◽  
Sanjay Parihar ◽  
R. N. Jadeja ◽  
Rajni Kant ◽  
Vivek K. Gupta
Keyword(s):  
Benzene Ring ◽  
Three Dimensional ◽  
Pyrazole Ring ◽  
Carbonyl Oxygen ◽  
Ring System ◽  
Dimensional Structure ◽  
Naphthalene Ring ◽  
Compound C ◽  
Schiff Base Compound ◽  
Base Compound

The title Schiff base compound, C28H21Cl2N3O, was synthesized by the condensation of 1-(3,4-dichlorophenyl)-3-methyl-4-(4-methylbenzoyl)-1H-pyrazol-5(4H)-one with 1-aminonaphthalene. Thep-tolyl ring is normal to the pyrazole ring, with a dihedral angle of 88.02 (14)°, and inclined to the naphthalene ring system by 78.60 (12)°. The pyrazole ring is inclined to the naphthalene ring system and the dichloro-substituted benzene ring by 63.30 (12) and 11.03 (13)°, respectively. The amino group and carbonyl oxygen atom are involved in an intramolecular N—H...O hydrogen bond enclosing anS(6) ring motif. There is also a short C—H...O contact involving the carbonyl O atom and the adjacent benzene ring. In the crystal, molecules are linked by C—H...π interactions, forming a three-dimensional structure.

scholarly journals Crystal structure ofN-(1-allyl-3-chloro-4-ethoxy-1H-indazol-5-yl)-4-methoxybenzenesulfonamide

2014 ◽  
Vol 70 (9) ◽  
pp. o1029-o1030
Author(s):  
Hakima Chicha ◽  
El Mostapha Rakib ◽  
Latifa Bouissane ◽  
Mohamed Saadi ◽  
Lahcen El Ammari
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Three Dimensional ◽  
Ring System ◽  
Torsion Angles ◽  
Compound C ◽  
Dimensional Network

In the title compound, C19H20ClN3O4S, the benzene ring is inclined to the indazole ring system (r.m.s. deviation = 0.014 Å) by 65.07 (8)°. The allyl and ethoxy groups are almost normal to the indazole ring, as indicated by the respective torsion angles [N—N—C—C = 111.6 (2) and C—C—O—C = −88.1 (2)°]. In the crystal, molecules are connected by N—H...N hydrogen bonds, forming helical chains propagating along [010]. The chains are linked by C—H...O hydrogen bonds, forming a three-dimensional network.

scholarly journals Crystal structure of 4-allylsulfanyl-1H-pyrazolo[3,4-d]pyrimidine

2014 ◽  
Vol 70 (9) ◽  
pp. o1038-o1038 ◽  
Author(s):  
Mohammed El Fal ◽  
Youssef Ramli ◽  
El Mokhtar Essassi ◽  
Mohamed Saadi ◽  
Lahcen El Ammari
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Pyrimidine Ring ◽  
Ring System ◽  
Maximum Deviation ◽  
Compound C ◽  
The Mean ◽  
Graph Set

In the title compound, C8H8N4S, the pyrazolo[3,4-d]pyrimidine ring system is essentially planar, with a maximum deviation from the mean plane of 0.025 (3) Å. The allyl group is disordered over two sites in a 0.512 (6):0.488 (6) ratio. In the crystal, molecules are linked by pairs of N—H...N hydrogen bonds, forming inversion dimers with anR22(8) graph-set motif.

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 Crystal structure of (4Z)-4-[(2E)-1-hydroxy-3-(naphthalen-2-yl)prop-2-en-1-ylidene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one

2015 ◽  
Vol 71 (6) ◽  
pp. o381-o381
Author(s):  
Muhammad Salim ◽  
Munawar Ali Munawar ◽  
Muhammad Nawaz Tahir ◽  
Muhammad Shahid ◽  
Khizar Iqbal Malik
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Pyrazole Ring ◽  
Ring System ◽  
Dihedral Angles ◽  
Stacking Interactions ◽  
Naphthalene Ring ◽  
Compound C

In the title compound, C23H18N2O2, the pyrazole ring subtends dihedral angles of 2.01 (13) and 1.55 (10)° with the pendant benzene ring and the naphthalene ring system, respectively. The molecule is almost planar (r.m.s. deviation for the 27 non-H atoms = 0.025 Å) and intramolecular O—H...O and C—H...O hydrogen bonds both closeS(6) loops. In the crystal, very weak aromatic π–π stacking interactions between the benzene and the pyrazole rings, with centroid–centroid distances of 3.8913 (14) and 3.9285 (15) Å, are observed.

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