Crystal structure of 10-ethyl-7-(9-ethyl-9H-carbazol-3-yl)-10H-phenothiazine-3-carbaldehyde

Abstract

The title compound, C29H24N2OS, contains a phenothiazine moiety linked to a planar carbazole unit (r.m.s. deviation = 0.029 Å) by a C—C single bond. The phenothiazine moiety possesses a typical non-planar butterfly structure with a fold angle of 27.36 (9)° between the two benzene rings. The dihedral angle between the mean planes of the carbazole and phenothiazine units is 27.28 (5)°. In the crystal, molecules stack in pairs along the c-axis direction, linked by offset π–π interactions [intercentroid distance = 3.797 (1) Å]. There are C—H...π interactions present linking these dimers to form a three-dimensional structure.