scholarly journals Crystal structure of ethyl 2-(2,4,5-trimethoxyphenyl)quinoline-4-carboxylate

2015 ◽  
Vol 71 (7) ◽  
pp. o514-o515
Author(s):  
T. O. Shrungesh Kumar ◽  
S. Naveen ◽  
M. N. Kumara ◽  
K. M. Mahadevan ◽  
N. K. Lokanath
Keyword(s):  
Crystal Structure ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Ring System ◽  
Quinoline Ring ◽  
Compound C ◽  
Methoxy Groups

In the title compound, C21H21NO5, the dihedral angle between the quinoline ring system (r.m.s. deviation = 0.028 Å) and the trimethoxybenzene ring is 43.38 (5)°. The C atoms of the methoxy groups deviate from their attached benzene ring by −0.396 (2), −0.049 (2) and 0.192 (2) Å for theortho-,meta- andpara-substituents, respectively. The pendant ethyl chain is disordered over two orientations in a 0.527 (5):0.473 (5) ratio. A short intramolecular C—H...O contact closes anS(6) ring. In the crystal, inversion dimers linked by pairs of weak C—H...O interactions generateR22(6) loops. The dimers are linked by further C—H...O interactions to generate [1-10] chains.

scholarly journals 4-(4-Fluorophenyl)-2-oxo-1,2,5,6-tetrahydrobenzo[h]quinoline-3-carbonitrile

2009 ◽  
Vol 65 (6) ◽  
pp. o1354-o1354
Author(s):  
Jinpeng Zhang ◽  
Jie Ding ◽  
Shu Yan ◽  
Liangce Rong ◽  
Lichun Xu
Keyword(s):  
Crystal Structure ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Ring System ◽  
Quinoline Ring ◽  
Compound C ◽  
Centroid Distance ◽  
Benzene Rings

In the molecule of the title compound, C20H13FN2O, the fluorophenyl ring is oriented at a dihedral angle of 72.76 (3)° with respect to the fused benzene ring. In the crystal structure, intermolecular N—H...O, C—H...O and C—H...F interactions link the molecules into chains. π–π contacts between the quinoline and benzene rings [centroid–centroid distance = 3.918 (3) Å] may further stabilize the structure. A weak C—H...π interaction is also present. The O atom and two of the CH2groups of the quinoline ring system are disordered over two positions. The O atom was refined with occupancies of 0.489 (17) and 0.511 (17), while C and H atoms were refined with occupancies of 0.435 (13) and 0.565 (13).

scholarly journals Crystal structure ofN1-phenyl-N4-[(quinolin-2-yl)methylidene]benzene-1,4-diamine

2014 ◽  
Vol 70 (9) ◽  
pp. o905-o906 ◽  
Author(s):  
Md. Serajul Haque Faizi ◽  
Ashraf Mashrai ◽  
Saleem Garandal ◽  
M. Shahid
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Benzene Ring ◽  
Title Compound ◽  
Phenyl Ring ◽  
Bond Angle ◽  
Ring System ◽  
Dihedral Angles ◽  
Quinoline Ring ◽  
Compound C

In the title compound, C22H17N3, the dihedral angles between the central benzene ring and the terminal phenyl ring and quinoline ring system (r.m.s. deviation = 0.027 Å) are 44.72 (7) and 9.02 (4)°, respectively, and the bond-angle sum at the amine N atom is 359.9°. In the crystal, the N—H group is not involved in hydrogen bonding and the molecules are linked by weak C—H...π interactions, generating [010] chains.

scholarly journals Crystal structure of 1-[(Z)-2-phenylhydrazin-1-ylidene]naphthalen-2(1H)-one

2015 ◽  
Vol 71 (5) ◽  
pp. o303-o303
Author(s):  
Ali Benosmane ◽  
Mohamed Amine Benaouida ◽  
Assia Mili ◽  
Abdelkader Bouchoul ◽  
Hocine Merazig
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Carbonyl Group ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Ring System ◽  
Imino Group ◽  
Compound C ◽  
Supramolecular Chains

In the title compound, C16H12N2O, the dihedral angle between the planes of the benzene ring and naphthalenone ring system is 1.89 (8)°; an intramolecular N—H...O hydrogen bond occurs between the imino group and the carbonyl group. In the crystal, molecules are linked by weak C—H...π interactions into supramolecular chains propagating along the [01-1] direction.

scholarly journals Crystal structure of ethyl 2-chloro-6-methylquinoline-3-carboxylate

2014 ◽  
Vol 70 (9) ◽  
pp. o941-o941
Author(s):  
Hasna Hayour ◽  
Abdelmalek Bouraiou ◽  
Sofiane Bouacida ◽  
Saida Benzerka ◽  
Ali Belfaitah
Keyword(s):  
Crystal Structure ◽  
Dihedral Angle ◽  
Torsion Angle ◽  
Title Compound ◽  
Ester Group ◽  
Ring System ◽  
Quinoline Ring ◽  
Compound C ◽  
Π Stacking ◽  
Methyl Torsion

In the title compound, C13H12ClNO2, the dihedral angle between the planes of the quinoline ring system (r.m.s. deviation = 0.029 Å) and the ester group is 54.97 (6)°. The C—O—C—Cm(m = methyl) torsion angle is −140.62 (16)°. In the crystal, molecules interactviaaromatic π–π stacking [shortest centroid–centroid separation = 3.6774 (9) Å] generating (010) sheets.

scholarly journals Crystal structure of 1-iodo-3-{[4-(tert-butylsulfanyl)phenyl]ethynyl}azulene

2015 ◽  
Vol 71 (8) ◽  
pp. o544-o545 ◽  
Author(s):  
Sebastian Förster ◽  
Wilhelm Seichter ◽  
Edwin Weber
Keyword(s):  
Crystal Structure ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Iodine Atom ◽  
Ring System ◽  
Membered Ring ◽  
Compound C

The title compound, C20H19IS, features a 1,3-disubstituted azulene involving an ethynylene elongated 4-(tert-butylsulfanyl)phenyl sidearm and an iodine atom as the substituents. The azulene ring system is almost planar (r.m.s. deviation = 0.012 Å) and subtends a dihedral angle of 35.7 (1)° with the benzene ring. As a result of the inherent dipole character of the azulene core, a supramolecular π–π dimer [separation between the centroids of the five- and seven-membered rings = 3.7632 (10) Å] with antiparallel orientated molecules can be observed in the crystal. The packing is consolidated by an unusual I...π(acetylene) contact [I...Cg= 3.34 Å, C—I...Cg= 173.3°], and a very weak C—H...π interaction is also found in the structure, with the azulene five-membered ring as the acceptor.

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

2014 ◽  
Vol 70 (9) ◽  
pp. o983-o984 ◽  
Author(s):  
Hakima Chicha ◽  
El Mostapha Rakib ◽  
Ahmed Gamouh ◽  
Mohamed Saadi ◽  
Lahcen El Ammari
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Ring System ◽  
Compound C

In the title compound, C15H14ClN3O3S, the dihedral angle between the planes of the indazole ring system (r.m.s. deviation = 0.007 Å) and the benzene ring is 89.05 (7)°. The methoxy C atom deviates from its attached ring by 0.196 (3) Å. In the crystal, inversion dimers linked by pairs of N—H...O hydrogen bonds generateR22(8) loops. The dimers are connected into [010] chains by C—H...O interactions.

scholarly journals 6-(1H-Indol-3-yl)-4-phenyl-2,2′-bipyridine-5-carbonitrile

2009 ◽  
Vol 65 (6) ◽  
pp. o1187-o1187 ◽  
Author(s):  
Weijun Zhu ◽  
Yan Xiang ◽  
Songlei Zhu
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Pyridine Ring ◽  
Ring System ◽  
Indole Ring ◽  
Compound C ◽  
Centrosymmetric Dimers

In the molecule of the title compound, C25H16N4, the pyridine rings are oriented at a dihedral angle of 0.92 (3)°, while the dihedral angle between the benzene ring and the adjacent pyridine ring is 56.51 (3)°. In the crystal structure, intermolecular N—H...N hydrogen bonds link the molecules into centrosymmetric dimers, formingR22(16) ring motifs. π–π contacts between the pyridine ring and the indole ring system and between the pyridine rings [centroid–centroid distances = 3.923 (2) and 3.724 (2) Å] may further stabilize the structure. Two weak C—H...π interactions are also present.

scholarly journals Crystal structure of (E)-3-(2,4-dimethoxyphenyl)-1-(1-hydroxynaphthalen-2-yl)prop-2-en-1-one

2014 ◽  
Vol 70 (9) ◽  
pp. o1034-o1035 ◽  
Author(s):  
Dongsoo Koh
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Ring System ◽  
Naphthalene Ring ◽  
Torsion Angles ◽  
Compound C ◽  
Methoxy Groups

In the title compound, C21H18O4, the C=C bond of the central enone group adopts anEconformation. The dihedral angle formed by the benzene ring and the naphthalene ring system is 6.60 (2)°. The methoxy groups on the benzene ring are essentially coplanar with the ring; the C—C—O—C torsion angles being 1.6 (2) and −177.1 (1)°. The hydroxy group attached to the naphthalene ring is involved in an intramolecular O—H...O hydrogen bond. The relative conformation of the two double bonds in the enone group iss-cisoid. In the crystal, weak C—H...O hydrogen bonds link the molecules into chains propagating along [010].

scholarly journals Crystal structure of methyl 1-methyl-2-oxospiro[indoline-3,2′-oxirane]-3′-carboxylate

2015 ◽  
Vol 71 (5) ◽  
pp. o274-o275 ◽  
Author(s):  
M. P. Savithri ◽  
P. S. Yuvaraj ◽  
B. S. R. Reddy ◽  
R. Raja ◽  
A. SubbiahPandi
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Ring System ◽  
Oxirane Ring ◽  
Indole Ring ◽  
Donor Group ◽  
Compound C

In the title compound, C12H11NO4, the dihedral angle between the indole ring system (r.m.s. deviation = 0.019 Å) and the oxirane ring is 88.8 (2)°. The oxirane O atom and the bridging ester O atom are in an approximate syn conformation [O—C—C—O = −25.4 (3)°] In the crystal, inversion dimers linked by pair of C—H...O hydrogen bonds generateR22(8) loops, where the C—H donor group forms part of the oxirane ring. A second C—H...O interaction arising from one of the C—H groups of the benzene ring links the dimers into [001] double chains.

scholarly journals 4-Chloro-3-methylphenyl quinoline-2-carboxylate

2013 ◽  
Vol 69 (12) ◽  
pp. o1842-o1843 ◽  
Author(s):  
E. Fazal ◽  
Manpreet Kaur ◽  
B. S. Sudha ◽  
S. Nagarajan ◽  
Jerry P. Jasinski
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Ring System ◽  
Stacking Interactions ◽  
Carboxylate Group ◽  
Quinoline Ring ◽  
Compound C ◽  
The Mean

In the title compound, C17H12ClNO2, the dihedral angle between the mean planes of the quinoline ring system and the benzene ring is 68.7 (7)°. The mean plane of the carboxylate group is twisted from the latter planes by 14.0 (1) and 80.2 (4)°, respectively. In the crystal, weak C—H...O interactions are observed, forming chains along [001]. In addition, π–π stacking interactions [centroid–centroid distances = 3.8343 (13) and 3.7372 (13)Å] occur. No classical hydrogen bonds were observed.

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