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

Abstract

In the molecule of the title compound, C 20H 13BrN 2O, the tetrahydrobenzo[h]quinoline fusedring system is buckled owing to the ethylene -CH 2CH 2- fragment, the benzene ring and the pyridine ring being twisted by 17.7 (1)°. The 4-substituted aromatic ring is bent away from the pyridine ring by 82.3 (1)° in order to avoid crowding the cyanide substituent. Two molecules are linked by a pair of N - H⋯O hydrogen bonds to form a centrosymmetric dimer.