5-Chloro-Benzothia-zole-2-Spiro-3'-Indolin-2'-One

Abstract

The title compound, C<inf>14</inf>H<inf>9</inf>ClN<inf>2</inf>OS, crystallizes with two unique molecules, A and B, in the asymmetric unit. The five-membered rings of the benzothia-zole groups in both molecules adopt an envelope conformation [puckering parameters: q<inf>2</inf> = 0.242 (1) Å and α<inf>2</inf> = 217.5 (4)° for A, and q<inf>2</inf> = 0.234 (1) Å and α<inf>2</inf> = 37.7 (4)° for B]. The five-membered rings of the indolinone groups in both molecules are also not planar, with a twisted conformation [puckering parameters are q<inf>2</inf> = 0.112 (2) Å and α<inf>2</inf> = 126.3 (8)° for A, and q<inf>2</inf> = 0.108 (2) Å and α<inf>2</inf> = 306.4 (9)° for B]. In the crystal structure, there are inter-molecular N - H⋯O, N - H⋯S and C - H⋯O hydrogen-bonding interactions, forming the layers propagating normal to c.