Title of article :
Crystal structures of 1-(4-chlorophenyl)-4-(4-methylphenyl)-2,5-dioxo-1,2,5,6,7,8-hexahydroquinoline-3-carboxylic acid and 4-(4-methoxyphenyl)-1-(4-methylphenyl)-2,5-dioxo-1,2,5,6,7,8-hexahydroquinoline-3-carbonitrile
Author/Authors :
Allah, Omyma A. Abd Chemistry Department - Faculty of Science - Sohag University, Egypt , Kaur, Manpreet Department of Chemistry - Keene State College, USA , Akkurt, Mehmet Department of Physics - Faculty of Sciences, Erciyes University,Turkey , Mohamed, Shaaban K. Chemistry and Environmental Division - Manchester Metropolitan University, England , Tamam, Asmaa H. A. hemistry Department - Faculty of Science - Sohag University, Egypt , Elgarhy, Sahar M. I. Faculty of Science - Department of Bio Chemistry - Beni Suef University, Beni Suef, Egypt , Jasinski, Jerry P. Department of Chemistry - Keene State College, USA
Abstract :
In the title compounds C23H21ClN2O3 [I, namely 1-(4-chlorophenyl)-4-(4-methylphenyl)-3,8-dioxo-1,2,5,6,7,8-hexahydroquine-3-carboxylic acid] and C24H22N2O3 [II, namely 4-(4-methoxyphenyl)-1-(4-methylphenyl)-2,5-dioxo-1,2,5,6,7,8-hexahydroquinoline-3-carbonitrile], each of the cyclohexene and dihydropyridine rings of the 1,2,5,6,7,8-hexahydroquinoline moieties adopts a twisted-boat conformation. The asymmetric units of both compounds I and II consist of two independent molecules (A and B). In IIA, three carbon atoms of the cyclohexene ring are disordered over two sets of sites in a 0.670 (11):0.330 (11) occupancy ratio. In the crystal of I, molecules are linked through classical N—H⋯O hydrogen bonds, forming inversion dimers with an R22(8) ring motif and with their molecular planes parallel to the crystallographic (020) plane. Non-classical C—H⋯O hydrogen-bonding interactions connect the dimers, resulting in a three-dimensional network. In the crystal of II, molecules are linked by C—H⋯N, C—H⋯O and C—H⋯π interactions, forming a three-dimensional network.
Keywords :
crystal structure , cyclohexene ring , dihydropyridine ring , hexahydroquinoline ring , dimer
Journal title :
Acta Crystallographica Section E: Crystallographic Communications
