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

2015 ◽  
Vol 71 (3) ◽  
pp. 296-298
Author(s):  
R. A. Nagalakshmi ◽  
J. Suresh ◽  
S. Maharani ◽  
R. Ranjith Kumar ◽  
P. L. Nilantha Lakshman
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Layered Structure ◽  
Title Compound ◽  
Pyridine Ring ◽  
Dihedral Angles ◽  
Π Interactions ◽  
Compound C ◽  
Centroid Distance ◽  
Cyclopentane Ring

In the title compound C22H18BrN3, the cyclopentane ring adopts an envelope conformation with the central methylene C atom as the flap. The dihedral angles between the central pyridine ring and the pendant benzyl and and bromobenzene rings are 82.65 (1) and 47.23 (1)°, respectively. In the crystal, inversion dimers linked by pairs of N—H...Nn(n = nitrile) hydrogen bonds generateR22(12) loops. These dimers are linked by weak π–π interactions [centroid–centroid distance = 3.7713 (14) Å] into a layered structure.

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 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).

scholarly journals Crystal structure of 6-ethoxypyridin-1-ium-2-olate

2014 ◽  
Vol 70 (11) ◽  
pp. o1146-o1146
Author(s):  
Kaijun Luo ◽  
Qing Guo ◽  
Yan Wang ◽  
Daibing Luo
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Pyridine Ring ◽  
Ethoxy Group ◽  
Π Interactions ◽  
Compound C ◽  
Centroid Distance

In the title compound, C7H9NO2, all non-H atoms are essentially coplanar [r.m.s. deviation = 0.032 Å]. The largest deviation from the plane of the pyridine ring is 0.105 (6) Å for the terminal C atom of the ethoxy group. In the crystal, molecules are linked by pairs of N—H...O hydrogen bonds, forming inversion dimers. These dimers are further linked by C—H...π interactions and weak π–π interactions between pyridine rings [centroid–centroid distance = 4.023 (1) Å].

scholarly journals Crystal structure of dimethyl 9H-carbazole-2,7-dicarboxylate

2015 ◽  
Vol 71 (10) ◽  
pp. o784-o785
Author(s):  
Ryan L. Lehane ◽  
James A. Golen ◽  
Arnold L. Rheingold ◽  
David R. Manke
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Ring System ◽  
Dihedral Angles ◽  
Mean Deviation ◽  
Π Interactions ◽  
Compound C ◽  
Centroid Distance ◽  
The Mean

In the title compound, C16H13NO4, the carbazole ring system is almost planar with non-H atoms possessing a mean deviation from planarity of 0.037 Å. The two ester groups are orientatedtransto one another and tilted slightly from the mean plane of the carbazole ring system, making dihedral angles of 8.12 (6) and 8.21 (5)°. In the crystal, molecules are linked by pairs of N—H...O hydrogen bonds forming inversion dimers. The dimers are linked by parallel slipped π–π interactions, forming slabs propagating along theb-axis direction [inter-centroid distance = 3.6042 (8) Å, inter-planar distance = 3.3437 (5) Å, slippage = 1.345 Å].

scholarly journals Crystal structure of 3-(thiophen-2-yl)-5-p-tolyl-4,5-dihydro-1H-pyrazole-1-carbothioamide

2015 ◽  
Vol 71 (7) ◽  
pp. 763-765 ◽  
Author(s):  
S. Naveen ◽  
G. Pavithra ◽  
Muneer Abdoh ◽  
K. Ajay Kumar ◽  
Ismail Warad ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Pyrazole Ring ◽  
Dihedral Angles ◽  
Π Interactions ◽  
Compound C ◽  
Centroid Distance

In the title compound, C15H15N3S2, the central pyrazole ring adopts a twisted conformation on the –CH—CH2– bond. Its mean plane makes dihedral angles of 7.19 (12) and 71.13 (11)° with those of the thiophene and toluene rings, respectively. The carbothiamide group [C(=S)—N] is inclined to the pyrazole ring mean plane by 16.8 (2)°. In the crystal, molecules are linked by N—H...S hydrogen bonds, forming chains propagating along [010]. Within the chains, there are N—H...π interactions present. Between the chains there are weak parallel slipped π–π interactions involving inversion-related thiophene and pyrazole rings [inter-centroid distance = 3.7516 (14) Å; inter-planar distance = 3.5987 (10) Å; slippage = 1.06 Å].

scholarly journals Crystal structure of 4-({(1E,2E)-3-[3-(4-fluorophenyl)-1-isopropyl-1H-indol-2-yl]allylidene}amino)-5-methyl-1H-1,2,4-triazole-5(4H)-thione

2015 ◽  
Vol 71 (11) ◽  
pp. 1411-1413 ◽  
Author(s):  
Ajaykumar D. Kulkarni ◽  
Md. Lutfor Rahman ◽  
Mashitah Mohd. Yusoff ◽  
Huey Chong Kwong ◽  
Ching Kheng Quah
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Dihedral Angles ◽  
Π Interactions ◽  
Compound C ◽  
Centroid Distance ◽  
Benzene Rings ◽  
Ring Motif

The title compound, C23H22FN5S, exists in atransconformation with respect to the methene C=C and the acyclic N=C bonds. The 1,2,4-triazole-5(4H)-thione ring makes dihedral angles of 88.66 (9) and 84.51 (10)°, respectively, with the indole and benzene rings. In the crystal, molecules are linked by pairs of N—H...S hydrogen bonds, forming inversion dimers with anR22(8) ring motif. The dimers are linkedviaC—H...π interactions, forming chains along [1-10]. The chains are linkedviaπ—π interactions involving inversion-related triazole rings [centroid–centroid distance = 3.4340 (13) Å], forming layers parallel to theabplane.

scholarly journals Crystal structure of 4-(1H-indol-3-yl)-2-(4-methoxyphenyl)-6-phenylpyridine-3-carbonitrile

2014 ◽  
Vol 70 (10) ◽  
pp. o1120-o1121 ◽  
Author(s):  
R. Vishnupriya ◽  
J. Suresh ◽  
Marimuthu Sakthi ◽  
Subbu Perumal ◽  
P. L. Nilantha Lakshman
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Pyridine Ring ◽  
Dihedral Angles ◽  
Π Interactions ◽  
Compound C ◽  
Π Stacking ◽  
Steric Crowding

In the title compound, C27H19N3O, the dihedral angles between the plane of the pyridine ring and those of the indole (r.m.s. deviation = 0.018 Å), phenyl and methoxybenzene substituents are 33.60 (6), 25.28 (7) and 49.31 (7)°, respectively. The N atom of the carbonitrile group is significantly displaced [0.288 (2) Å] from the plane of the pyridine ring, perhaps due to steric crowding. In the crystal, inversion dimers linked by pairs of N—H...Nn(n = nitrile) hydrogen bonds generateR22(16) loops. Aromatic π–π stacking [centroid–centroid separation = 3.6906 (7) Å] and very weak C—H...π interactions are also observed".

scholarly journals Crystal structure ofN-{4-[(6-chloropyridin-3-yl)methoxy]phenyl}-2,6-difluorobenzamide

2016 ◽  
Vol 72 (1) ◽  
pp. 60-62 ◽  
Author(s):  
Ying Liang ◽  
Li-Qiao Shi ◽  
Zi-Wen Yang
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Dihedral Angles ◽  
Π Interactions ◽  
Compound C

In the title compound, C19H13ClF2N2O2, the conformation of the N—H bond in the amide segment isantito the C=O bond. The molecule is not planar, with dihedral angles between the central benzene ring and the outer benzene and pyridyl rings of 73.35 (7) and 81.26 (6)°, respectively. A weak intramolecular C—H...O hydrogen bond occurs. In the crystal, N—H...N, C—H...O and C—H...F hydrogen bonds lead to the formation of dimers. The N—H...N inversion dimers are linked by π–π contacts between adjacent pyridine rings [centroid–centroid = 3.8541 (12) Å] and C—H...π interactions. These contacts combine to stack the molecules along theaaxis.

scholarly journals Crystal structure of 3-amino-2-ethylquinazolin-4(3H)-one

2015 ◽  
Vol 71 (9) ◽  
pp. o650-o651
Author(s):  
Gamal A. El-Hiti ◽  
Keith Smith ◽  
Amany S. Hegazy ◽  
Mohammed Baashen ◽  
Benson M. Kariuki
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Torsion Angle ◽  
Title Compound ◽  
Ethyl Group ◽  
Π Interactions ◽  
Step Structure ◽  
Compound C ◽  
Centroid Distance

The molecule of the title compound, C10H11N3O, is planar, including the ethyl group, as indicated by the N—C—C—C torsion angle of 1.5 (2)°. In the crystal, inversion-related molecules are stacked along theaaxis. Molecules are oriented head-to-tail and display π–π interactions with a centroid-to-centroid distance of 3.6664 (8) Å. N—H...O hydrogen bonds between molecules generate a `step' structure through formation of anR22(10) ring.

scholarly journals Crystal structure of 2-(4-chlorophenyl)-4-(1H-indol-3-yl)-6-phenylpyridine-3-carbonitrile

2014 ◽  
Vol 70 (9) ◽  
pp. o978-o978 ◽  
Author(s):  
R. Vishnupriya ◽  
J. Suresh ◽  
Pethaiah Gunasekaran ◽  
Subbu Perumal ◽  
P. L. Nilantha Lakshman
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Pyridine Ring ◽  
Dihedral Angles ◽  
Compound C

In the title compound, C26H16ClN3, the dihedral angles between the central pyridine ring and the pendant phenyl, chlorobenzene and indole rings are 18.52 (12), 48.97 (11) and 21.20 (10)°, respectively. An intramolecular C—H...Nc(c = cyanide) hydrogen bond occurs. In the crystal, inversion dimers linked by pairs of N—H...Nchydrogen bonds generateR22(16) loops.

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