Crystal structures of 2'-benzoyl-1'-(4-methyl-phenyl)-1,1',2,2',5',6',7',7a'-octa-hydro-spiro-[indole-3,3'-pyrrolizin]-2-one and 2'-(4-bromo-benzoyl)-1'-(2-chloro-phen-yl)-1,1',2,2',5',6',7',7a'-octa-hydro-spiro-[indole-3,3'-pyrrolizin]-2-one

• Published in: Acta crystallographica. Section E, Crystallographic communications Crystallographic communications, 2016-11, Vol.72 (Pt 11), p.1637-1641
• Main Authors: Chandrarekha, M, Srinivasan, N, Kottala Vijaya, P, Siva, A, Krishnakumar, R V
• Format: Article
• Language: English
• Subjects: Research Communications
• ISSN: 2056-9890; 2056-9890
• DOI: 10.1107/S2056989016016741

The two title compounds, C H N O , (I), and C H BrClN O , (II), differ in their substituents, .4-methyl-phenyl and benzoyl rings in (I) replaced by 2-chloro-phenyl and 4- bromo-benzoyl, respectively, in (II). A significant difference between the two mol-ecules is found in the deviation of the benzoyl O atom from the least-squares plane of the ring to which it is attached [0.593 (4) and 0.131 (3) Å, respectively], a fact which may be attributed to the different participation of the benzoyl O atoms as acceptors in their inter-molecular C-H⋯O inter-actions. The chemical modifications in (I) and (II) do not seem to affect the type nor strength of the inter-molecular N-H⋯N and C-H⋯O hydrogen bonds responsible for the two crystal structures, such that the aggregation of mol-ecules appears similar in spite of the mol-ecular changes.