scholarly journals Crystal structure and Hirshfeld surface analysis of (E)-2-[1-hydroxy-2-(pyridin-2-yl)ethyl]-4-[2-(4-methoxyphenyl)diazen-1-yl]phenol

2019 ◽  
Vol 75 (5) ◽  
pp. 600-603
Author(s):  
Md. Serajul Haque Faizi ◽  
Pratik Sen ◽  
Gyanesh Kumar Saxena ◽  
Irina A. Golenya
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Pyridine Ring ◽  
Interplanar Distance ◽  
Hirshfeld Surface ◽  
Supramolecular Framework ◽  
Π Interactions ◽  
Compound C ◽  
Ring Motif

In the title compound, C20H19N3O3, the configuration about the azo N=N bond is E, and the central benzene ring is inclined to the pyridine ring by 31.43 (8)° and to the 4-methoxyphenyl ring by 4.73 (8)°. In the crystal, molecules are linked by pairs of O—H...N hydrogen bonds, forming inversion dimers with an R 2 2(12) ring motif. The dimers are linked by O—H...O and C—H...O hydrogen bonds, forming layers parallel to the ac plane. There are C—H...π interactions present within the layers and between the layers, leading to the formation of a supramolecular framework. The layers are also linked by offset π–π interactions, with an interplanar distance of 3.416 (2) Å.

scholarly journals Crystal structure of 2-benzylamino-4-p-tolyl-6,7-dihydro-5H-cyclopenta[b]pyridine-3-carbonitrile

2015 ◽  
Vol 71 (2) ◽  
pp. 192-194
Author(s):  
R. A. Nagalakshmi ◽  
J. Suresh ◽  
S. Maharani ◽  
R. Ranjith Kumar ◽  
P. L. Nilantha Lakshman
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Pyridine Ring ◽  
Three Dimensional ◽  
Π Interactions ◽  
Compound C ◽  
Centroid Distance ◽  
Cyclopentane Ring ◽  
Ring Motif

The title compound, C23H21N3, comprises a 2-amino-3-cyanopyridine ring fused with a cyclopentane ring. The later adopts an envelope conformation with the central methylene C atom as the flap. The benzyl and andp-tolyl rings are inclined to one another by 56.18 (15)°, and to the pyridine ring by 81.87 (14) and 47.60 (11)°, respectively. In the crystal, molecules are linked by pairs of N—H...Nnitrilehydrogen bonds, forming inversion dimers with anR22(12) ring motif. The dimers are linked by C—H...π and π–π interactions [centroid–centroid distance = 3.7211 (12) Å], forming a three-dimensional framework.

scholarly journals Crystal structure and Hirshfeld surface analysis of 4-allyl-6-bromo-2-(4-chlorophenyl)-4H-imidazo[4,5-b]pyridine

2019 ◽  
Vol 75 (1) ◽  
pp. 43-48
Author(s):  
Selma Bourichi ◽  
Youssef Kandri Rodi ◽  
Tuncer Hökelek ◽  
Amal Haoudi ◽  
Catherine Renard ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Pyridine Ring ◽  
Ring System ◽  
Hirshfeld Surface ◽  
Stacking Interactions ◽  
Compound C ◽  
Ring Motif

The title compound, C15H11BrClN3, is built up from a planar imidazo[4,5-b]pyridine unit linked to phenyl and allyl substituents. The allyl substituent is rotated significantly out of the imidazo[4,5-b]pyridine plane, while the benzene ring is inclined by 3.84 (6)° to the ring system. In the crystal, molecules are linked via a pair of weak intermolecular C—H...N hydrogen bonds, forming an inversion dimer with an R 2 2(20) ring motif. The dimers are further connected by π–π stacking interactions between the imidazo[4,5-b]pyridine ring systems [centroid–centroid distances = 3.7161 (13) and 3.8478 (13) Å]. The important contributions to the Hirshfeld surface are H...H (35.9%), H...Cl/Cl...H (15.0%), H...C/C...H (12.4%), H...Br/Br...H (10.8%), H...N/N...H (7.5%), C...Br/Br...C (5.9%), C...C (5.5%) and C...N/N...C (4.0%) contacts.

scholarly journals Crystal structure of 26-(4-methylphenyl)-8,11,14,17-tetraoxa-28-azatetracyclo[22.3.1.02,7.018,23]hexacosa-2,4,6,18(23),19,21,24(1),25,27-nonaene

2016 ◽  
Vol 72 (5) ◽  
pp. 663-666 ◽  
Author(s):  
T. Thanh Van Tran ◽  
Le Tuan Anh ◽  
Hung Huy Nguyen ◽  
Hong Hieu Truong ◽  
Anatoly T. Soldatenkov
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Pyridine Ring ◽  
Three Dimensional ◽  
Π Interactions ◽  
Compound C ◽  
Benzene Rings ◽  
Tetracyclic System ◽  
Ring Motif

The title compound, C30H29NO4, is a tetracyclic system containing a 4-arylpyridine fragment, two benzene rings and an aza-17-crown-5 ether moiety, in a bowl-like arrangement. The pyridine ring is inclined to the 4-methylphenyl ring by 26.64 (6)°, and by 57.43 (6) and 56.81 (6)° to the benzene rings. The benzene rings are inclined to one another by 88.32 (6)°. In the crystal, molecules are linked by pairs of C—H...N hydrogen bonds, forming inversion dimers with anR22(14) ring motif. The dimers are linkedviaa number of C—H...π interactions, forming a three-dimensional architecture.

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 Crystal structure of 1-benzyl-4-formyl-1H-pyrrole-3-carboxamide

2016 ◽  
Vol 72 (2) ◽  
pp. 133-135
Author(s):  
Qi-Di Zhong ◽  
Sheng-Quan Hu ◽  
Hong Yan
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Π Interactions ◽  
Bond Forming ◽  
Compound C ◽  
The Mean ◽  
Ring Motif

In the title compound, C13H12N2O2(I), the mean planes of the pyrrole and benzyl rings are approximately perpendicular, forming a dihedral angle of 87.07 (4) °. There is an intramolecular N—H...O hydrogen bond forming an S(7) ring motif. In the crystal, molecules are linkedviaa pair of N—H...O hydrogen bonds forming inversion dimers. C—H...O hydrogen bonds link the dimers into chains along direction [10-1]. The chains are further linked by weak C—H...π interactions forming layers parallel to theacplane.

scholarly journals Crystal structure of 7-{[bis(pyridin-2-ylmethyl)amino]methyl}-5-chloroquinolin-8-ol

2015 ◽  
Vol 71 (12) ◽  
pp. 1545-1547
Author(s):  
Koji Kubono ◽  
Kimiko Kado ◽  
Yukiyasu Kashiwagi ◽  
Keita Tani ◽  
Kunihiko Yokoi
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Hydroxy Group ◽  
Title Compound ◽  
Dihedral Angles ◽  
Π Interactions ◽  
Compound C ◽  
Centroid Distance ◽  
Ring Motif

In the title compound, C22H19ClN4O, the quinolinol moiety is almost planar [r.m.s. deviation = 0.012 Å]. There is an intramolecular O—H...N hydrogen bond involving the hydroxy group and a pyridine N atom forming anS(9) ring motif. The dihedral angles between the planes of the quinolinol moiety and the pyridine rings are 44.15 (9) and 36.85 (9)°. In the crystal, molecules are linkedviaC—H...O hydrogen bonds forming inversion dimers with anR44(10) ring motif. The dimers are linked by C—H...N hydrogen bonds, forming ribbons along [01-1]. The ribbons are linked by C—H...π and π–π interactions [inter-centroid distance = 3.7109 (11) Å], forming layers parallel to (01-1).

2,6-Dimethylpyridinium hydrogen (2R,3R)-(+)-tartrate sesquihydrate

2006 ◽  
Vol 62 (4) ◽  
pp. o1433-o1434
Author(s):  
Zi-Liang Wang ◽  
Ming-Xue Li ◽  
Lin-Heng Wei ◽  
Jing-Ping Wang
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Three Dimensional ◽  
Supramolecular Framework ◽  
Π Interactions ◽  
Compound C

The crystal structure of the title compound, C7H10N+·C4H5O6 −·1.5H2O, is based on a three-dimensional supramolecular framework constructed through N—H...O hydrogen bonds and weak π–π interactions.

scholarly journals Crystal structure of a photobiologically active brominated angular pyranocoumarin: bromo-hydroxy-seselin

2017 ◽  
Vol 73 (3) ◽  
pp. 453-455 ◽  
Author(s):  
A. K. Bauri ◽  
Sabine Foro ◽  
A. F. M. Mustafizur Rahman
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Chair Conformation ◽  
Axis Direction ◽  
Π Interactions ◽  
Compound C ◽  
Ring Motif

The title compound, C14H13BrO3[systematic name:rac-(9S,10R)-9-bromo-10-hydroxy-8,8-dimethyl-9,10-dihydro-2H,8H-pyrano[2,3-f]chromen-2-one], is a substituted pyranocoumarin, obtained by bromination of seselin [8,8-dimethyl-2H,8H-pyrano[2,3-f]chromen-2-one], which was isolated from the Indian herbTrachyspermum stictocarpum(Aajmod). The pyrano ring has a distorted half-chair conformation and its mean plane is inclined to the coumarin mean plane by 1.6 (2)°. In the crystal, molecules are linked by pairs of O—H...O hydrogen bonds, forming inversion dimers with anR22(16) ring motif. The dimers stack along thea-axis direction and are linked by offset π–π interactions, forming columns [intercentroid distance = 3.514 (4) Å].

scholarly journals The crystal structure, Hirshfeld surface analysis and energy frameworks of 2-[2-(methoxycarbonyl)-3,6-bis(methoxymethoxy)phenyl]acetic acid

2020 ◽  
Vol 76 (7) ◽  
pp. 1101-1106
Author(s):  
Mustapha Tiouabi ◽  
Raphaël Tabacchi ◽  
Helen Stoeckli-Evans
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Acetic Acid ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Hirshfeld Surface ◽  
Supramolecular Framework ◽  
Phenyl Acetic Acid ◽  
Oh Groups ◽  
Compound C

In the title compound, C14H18O8, (I), the methoxycarbonyl [–C(=O)OCH3] and the acetic acid [–CH2C(=O)OH] groups are inclined to the benzene ring by 79.24 (11) and 76.71 (13)°, respectively, and are normal to each other with a dihedral angle of 90.00 (13)°. In the crystal, molecules are linked by a pair of O—H...O hydrogen bonds forming the familiar acetic acid inversion dimer. The dimers are linked by two C—H...O hydrogen bonds and an offset π–π interaction [intercentroid distance = 3.6405 (14) Å], forming layers lying parallel to the (10\overline{1}) plane. The layers are linked by a third C—H...O hydrogen bond and a C—H...π interaction to form a supramolecular framework.

scholarly journals 6-Iodo-1H-indole-2,3-dione

IUCrData ◽  
2016 ◽  
Vol 1 (4) ◽  
Author(s):  
James A. Golen ◽  
David R. Manke
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Three Dimensional ◽  
Interplanar Distance ◽  
Π Interactions ◽  
Compound C ◽  
Dimensional Network ◽  
Ring Motif ◽  
Close Contacts

The molecule of the title compound, C8H4INO2, is almost planar, having an r.m.s. deviation from planarity of 0.019 Å for all non-H atoms. In the crystal, molecules are linked by pairs of N—H...O hydrogen bonds, forming inversion dimers with anR22(8) ring motif. The dimers are further linked by I...O close contacts of 3.078 (2) Å, forming chains along [10-1]. The nine-membered fused rings of the isatin molecules stack along thebaxis, with parallel slipped π–π interactions [intercentroid distance = 3.594 (2) Å, interplanar distance = 3.379 (1) Å and slippage = 1.243 Å]. These interactions lead to the formation of a three-dimensional network.

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