Crystal and molecular structure of 1-methyl-2′-(p-tolylsulphonamido)-2-(p-tolylsulphonylimino)indoline-3-spirocyclopentane

Abstract

The crystal and molecular structure of the title compound (monoclinic, a= 13·77, b= 24·29, c= 7·77 Å, γ= 102·8°, space group P2₁/b, Z= 4, linear diffractometer data) has been determined by direct methods and refined by least squares to R 0·074 for 2391 independent reflections. The indoline system is planar [CN 1·294(8)Å] and the bond lengths at the sulphur atom of the sulphonylimino group [S–N, 1·553(5), S–O 1·440(7)(mean), S–C 1·756(7)Å] differ significantly from those in the sulphonamido-group [S–N 1·619(6), S–O 1·413(6)(mean), S–C 1·762(7)Å]. The bond lengths about the carbon atom at the spiro-ring junction [C–C, 1·595(9) and 1·488(9)Å] differ significantly from the value (1·54 Å) expected for a single C–C bond; this can be attributed to steric interactions between atoms adjacent to this junction.