5-Nitrosalicylaldehyde (2-hydroxybenzoyl)hydrazone

2006 ◽  
Vol 62 (7) ◽  
pp. o3026-o3027 ◽  
Author(s):  
Hong-Mei Xu ◽  
Shi-Xiong Liu
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Crystal Packing ◽  
Dihedral Angles ◽  
Stacking Interactions ◽  
Aromatic Rings ◽  
Compound C ◽  
Π Stacking

The molecule of the title compound, C14H11N3O5, is approximately planar, the dihedral angles between the two aromatic rings being 4.63 (7)°. O—H...N, N—H...O and O—H...O hydrogen bonds and π–π stacking interactions help to consolidate the crystal packing.

scholarly journals (Z)-1-(2-Chlorophenyl)-3-methyl-4-[2-(4-nitrophenyl)hydrazin-1-ylidene]-1H-pyrazol-5(4H)-one

2012 ◽  
Vol 68 (8) ◽  
pp. o2351-o2352 ◽  
Author(s):  
Carlos Bustos ◽  
Andrés Escobar-Fuentealba ◽  
Luis Alvarez-Thon ◽  
Rodrigo Faundez-Gutierrez ◽  
Maria Teresa Garland
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Crystal Packing ◽  
Pyrazole Ring ◽  
Dihedral Angles ◽  
Stacking Interactions ◽  
Asymmetric Unit ◽  
Compound C ◽  
Π Stacking ◽  
Independent Molecules

There are two independent molecules,AandB, in the asymmetric unit of the title compound, C16H12ClN5O3. The relative orientations of the chlorophenyl ring with respect to the pyrazole ring in the two crystallographically independent molecules are different, and their corresponding dihedral angles are −53.3 (2) and 114.09 (18)° in moleculesAandB, respectively. There are two strong intramolecular N—H...O hydrogen bonds, and two weak intramolecular C—H...O and C—H...Cl hydrogen bonds. The crystal packing is constructed by weak C—H...O and N—H...O interactions, and two π–π stacking interactions [centroid–centroid distances = 3.7894 (9) and 3.5719 (10) Å], forming a molecular ladder along theaaxis.

scholarly journals N-Methyl-N-nitroso-p-toluenesulfonamide

2014 ◽  
Vol 70 (7) ◽  
pp. o782-o782
Author(s):  
Kartik Rai ◽  
Vincent Wu ◽  
Priya Gupta ◽  
David A. Laviska ◽  
Benny C. Chan
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Methyl Groups ◽  
Stacking Interactions ◽  
Aromatic Rings ◽  
Compound C ◽  
Π Stacking ◽  
Centroid Distance

The crystal structure of the title compound, C8H10N2O3S, displays predominant C—H...O hydrogen-bonding and π–π stacking interactions. The hydrogen bonds are between the O atoms of the sulfonyl group and H atoms on methyl groups. The π–π stacking interactions occur between adjacent aromatic rings, with a centroid–centroid distance of 3.868 (11) Å. These interactions lead to the formation of chains parallel to (101).

scholarly journals 3-(4-Chlorophenyl)-5-[4-(methylsulfanyl)phenyl]-1H-pyrazole

IUCrData ◽  
2016 ◽  
Vol 1 (4) ◽  
Author(s):  
Ganesan Suresh ◽  
Sarangapani Muniraj
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Three Dimensional ◽  
Pyrazole Ring ◽  
Dihedral Angles ◽  
Stacking Interactions ◽  
Compound C ◽  
Π Stacking ◽  
Dimensional Network

In the title compound, C16H13ClN2S, the pyrazole ring is almost planar with an r.m.s. deviation of 0.0457 Å which forms dihedral angles of 2.875 (4) and 84.83 (7)° with the chloro-substituted benzene ring and the methylsulfanyl-substituted ring, respectively. In the crystal, N—H...N and C—H...Cl hydrogen bonds contribute to the formation of a three-dimensional network. In addition, several offset π–π stacking interactions are also present.

(E)-2-Bromo-4,5-dimethoxybenzaldehyde oxime

2006 ◽  
Vol 62 (5) ◽  
pp. o1946-o1947
Author(s):  
Xiang Li ◽  
Da-Min Tian
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Crystal Packing ◽  
Stacking Interactions ◽  
Asymmetric Unit ◽  
Bond Lengths ◽  
Compound C ◽  
Π Stacking ◽  
Independent Molecules

The title compound, C9H10BrNO3, which exists as the E isomer, crystallizes with two independent molecules in the asymmetric unit. The bond lengths and angles in both molecules are normal. The crystal packing is stabilized by intermolecular O—H...O hydrogen bonds, which link the molecules into circular tetramers, and by weak π–π stacking interactions.

scholarly journals 6,7-Dichloro-3-(2,4-dichlorobenzyl)quinoxalin-2(1H)-one

2012 ◽  
Vol 68 (8) ◽  
pp. o2481-o2481
Author(s):  
Jinpeng Zhang ◽  
Yinan Wang ◽  
Qian Wang ◽  
Lichun Xu
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Crystal Packing ◽  
Ring System ◽  
Stacking Interactions ◽  
Pyrazine Ring ◽  
Compound C ◽  
Π Stacking ◽  
Quinoxaline Ring

In the title compound, C15H8Cl4N2O, the quinoxaline ring system is almost planar, with a dihedral angle between the benzene and pyrazine rings of 3.1 (2)°. The 2,4-dichlorophenyl ring is approximately perpendicular to the pyrazine ring, with a dihedral angle of 86.47 (13)° between them. The crystal packing features intermolecular N—H...O hydrogen bonds and π–π stacking interactions, with centroid–centroid distances in the range 3.699 (3)–4.054 (3) Å.

scholarly journals Crystal structure of (E)-N'-[1-(4-aminophenyl)ethylidene]-2-hydroxy-5-iodobenzohydrazide methanol monosolvate

2018 ◽  
Vol 74 (7) ◽  
pp. 910-914
Author(s):  
Cong Nguyen Tien ◽  
Huong Le Thi Thu ◽  
Thin Nguyen Van ◽  
Trung Vu Quoc ◽  
Manh Vu Quoc ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Crystal Packing ◽  
Hirshfeld Surface ◽  
Stacking Interactions ◽  
Aromatic Rings ◽  
Compound C

In the title compound, C15H14IN3O2·CH3OH, two aromatic rings are linked by an N-substituted hydrazide function. The dihedral angle between the aromatic rings is 10.53 (8)°. The stereochemistry about the imine function is E. The methanol molecule forms an O—H...O hydrogen bond to the hydrazide O atom. In the crystal, chains of molecules running along the c-axis direction are formed by O—H...O hydrogen bonds. Adjacent chains are linked through N—H...O hydrogen bonds and π–π stacking interactions. The intermolecular interactions in the crystal packing were investigated using Hirshfeld surface analysis, which indicated that the most significant contacts are H...H (38.2%), followed by C...H/H...C (20.6%), O...H/H...O (11.1%) and I...H/H...I (9.7%).

scholarly journals Ethyl 1-(2-bromoethyl)-3-(4-methoxyphenyl)-1H-pyrazole-5-carboxylate

2012 ◽  
Vol 68 (8) ◽  
pp. o2513-o2513 ◽  
Author(s):  
Ling Yin ◽  
Yi Wang ◽  
Ying-Ying Wang ◽  
Jian-Wu Wang
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Crystal Packing ◽  
Stacking Interactions ◽  
Compound C ◽  
Π Stacking ◽  
Centroid Distance

In the title compound, C15H17BrN2O3, the dihedral angle between the benzene and pyrazole rings is 5.63 (2)°. The crystal packing is stabilized by weak π–π stacking interactions [centroid–centroid distance = 3.927 (5) Å] and intermolecular C—H...O and C—H...Br hydrogen bonds.

scholarly journals 6,6′-Dimethoxy-2,2′-[(E,E′)-(2,4,6-trimethyl-1,3-phenylene)bis(nitrilomethanylylidene)]diphenol chloroform monosolvate

2012 ◽  
Vol 68 (4) ◽  
pp. o1176-o1176
Author(s):  
Hadariah Bahron ◽  
Najihah Abu Bakar ◽  
Bohari M. Yamin ◽  
M. Sukeri M. Yusof
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Molecular Conformation ◽  
Crystal Packing ◽  
Solvent Molecule ◽  
Dihedral Angles ◽  
Stacking Interactions ◽  
Aromatic Rings ◽  
Compound C ◽  
Benzene Rings

In the title compound, C25H26N2O4·CHCl3, the aromatic rings of the iminomethyl-6-methoxyphenol fragments make dihedral angles of 58.33 (6) and 87.74 (6)° with the central benzene ring. The molecular conformation is stabilized by intramolecular O—H...N hydrogen bonds. In the crystal, an intermolecular C—H...O hydrogen bond involving the chloroform solvent molecule is observed. The crystal packing is further stabilized by π–π stacking interactions [centroid–centroid distances = 3.739 (3)–3.776 (3) Å] between the benzene rings of centrosymmetrically related molecules.

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 A new polymorph of 5,5′-(ethane-1,2-diyl)bis(1H-tetrazole)

2012 ◽  
Vol 68 (4) ◽  
pp. o989-o989 ◽  
Author(s):  
Cheng-Fang Qiao ◽  
Chun-Sheng Zhou ◽  
Qing Wei ◽  
Zheng-Qiang Xia
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Crystal Packing ◽  
Mirror Plane ◽  
Stacking Interactions ◽  
Asymmetric Unit ◽  
Compound C ◽  
Π Stacking ◽  
Centroid Distance

The asymmetric unit of the title compound, C4H6N8, contains a quarter of the molecule, which possesses a crystallographically imposed centre of symmetry with all non-H atoms situated on a mirror plane. The crystal packing exhibits intermolecular N—H...N hydrogen bonds and π–π stacking interactions between the tetrazole rings of adjacent molecules [centroid–centroid distance = 3.4402 (10) Å].

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