N-Methyl-2-(1,2,3,4-tetra­hydro­naph­thalen-1-yl­idene)hydrazinecarbo­thio­amide

There are two independent mol­ecules in the asymmetric unit of the title compound, C(12)H(15)N(3)S, both of which display disorder of several C atoms in the N-bound ring (occupancy ratios of 0.75:0.25 in the first independent mol­ecule and 0.50:0.50 in the second) with the methyl H atoms also being disordered in the first mol­ecule (occupancy ratio of 0.70:0.30). The planes of the benzene ring and the N—N—C—N fragment make dihedral angles of 12.92 (14)° in the first independent mol­ecule and 7.60 (13)° in the second. In the crystal, mol­ecules are linked by weak N—H⋯S hydrogen bonds into chains along the a-axis direction. The crystal packing ressembles a herringbone arrangement.