Abstract
The title compound, C13H15N3S2, crystallizes with two unique molecules, A and B, in the asymmetric unit. These differ principally in that the methyl group of the 4-ethylthiosemicarbazone moiety is ordered in molecule A but disordered over two positions with equal occupancies in molecule B. The benzothiophene group and the semicarbazone unit are inclined at dihedral angles of 11.78 (8)degrees for molecule A and 8.18 (13)degrees for molecule B. Weak intramolecular N-H center dot center dot center dot N interactions contribute to the planarity of the semicarbazone units in both molecules and each molecule adopts an E configuration with respect to the C N bonds. In the crystal structure, molecules form centrosymmetric dimers as a result of N-H center dot center dot center dot S hydrogen bonds, augmented by C-H center dot center dot center dot S interactions for molecule A and C-H center dot center dot center dot S interactions for molecule B. Weak C-H center dot center dot center dot pi interactions stack the dimers of both molecules into columns down the a axis.