title: 2-[(1Z)-(9-Ethyl-9H-carbazol-3-yl)methyl-eneamino]-4,5,6,7-tetra-hydro-1-benzothio-phene-3-carbonitrile-benzene (2/1).
abstract: In the title compound, 2C(24)H(21)N(3)S·C(6)H(6), the two independent Schiff base mol-ecules (A and B) in the asymmetric unit differ in the orientation of the tetra-hydro-benzothio-phene ring system with respect to the carbazole ring system by 180° rotation about the C-C bond in the C-C=N-C linkage. The two mol-ecules also differ in the orientation of the ethyl groups [C-N-C-C torsion angle of 90.7 (3)° in mol-ecule A, and -79.4 (3)° in mol-ecule B]. In mol-ecule B, two methyl-ene C atoms of the cyclo-hexene ring are disordered over two sites with occupancies of 0.58 (1) and 0.42 (1). The cyclo-hexene rings in both mol-ecules adopt half-chair conformations. The dihedral angle between the thio-phene ring and the carbazole ring system is 8.07 (9)° in mol-ecule A [3.10 (9)° in mol-ecule B]. In the crystal structure, the independent mol-ecules are linked into dimers by inter-molecular C-H⋯N hydrogen bonds. In addition, C-H⋯π inter-actions are observed.
authors.forename: Hoong-Kun
authors.initials: HK
authors.lastname: Fun
authors.forename: Jia Hao
authors.initials: JH
authors.lastname: Goh
authors.forename: Abdullah M
authors.initials: AM
authors.lastname: Asiri
authors.forename: Salman A
authors.initials: SA
authors.lastname: Khan
authors.forename: Khalid A
authors.initials: KA
authors.lastname: Khan