(Z)-N,N-Dimethyl-2-[phen-yl(pyridin-2-yl)methyl-idene]hydrazinecarbothio-amide.

The title compound, C(15)H(16)N(4)S, exists in the Z conformation with the thionyl S atom lying cis to the azomethine N atom. The shortening of the N-N distance [1.3697 (17) Å] is due to extensive delocalization with the pyridine ring. The hydrazine-carbothio-amide unit is almost planar, with a maximum deviation of 0.013 (2) Å for the amide N atom. The stability of this conformation is favoured by the formation of an intra-molecular N-H⋯N hydrogen bond. The packing of the mol-ecules involves no classical inter-molecular hydrogen-bonding inter-actions; however, a C-H⋯π inter-action occurs.