1-{3-[(4-Oxopiperidin-1-yl)carbon-yl]benzoyl}piperidin-4-one.

ABSTRACT: Two independent mol-ecules comprise the asymmetric unit in the title compound, C(18)H(20)N(2)O(4). One of the mol-ecules exhibits disorder in one of its 4-piperidone rings, which is disposed over two orientations [site occupancy of the major component = 0.651?(5)]. The first independent mol-ecule and the minor component of the second disordered mol-ecule are virtually superimposable. The central four C atoms in the major component of the disordered mol-ecule have an opposite orientation. All the 4-piperidone rings have a chair conformation. The carbonyl groups in each mol-ecule have approximate anti conformations [O=C?C=O = 146.2?(2) and -159.9?(2)°]. The 4-piperidone rings lie to opposite sides of the central benzene ring in both mol-ecules. In the crystal, mol-ecules are linked by C-H?O inter-actions. The crystal studied was found to be a non-merohedral twin (twin law -1 0 0, 0 1 0, 0 - 1/2 - 1), the fractional contribution of the minor component being approximately 11%.

SUBMITTER: Rajesh K 

PROVIDER: S-EPMC3007266 | biostudies-literature | 2010 Jul

REPOSITORIES: biostudies-literature