N,N′-Bis[2-(2-pyridyl)ethyl]dithiooxamide

The title compound, C16H18N4S2, has a crystallographic inversion centre at the mid-point of the central C-C bond. The plane of the dithiooxamide fragment is approximately perpendicular to the plane of the dimethylene bridge [ dihedral angle = 84.8 (1)degrees], the plane of which is in turn normal to the pyridine ring plane [ dihedral angle = 89.80 (8)degrees]. An intermolecular N-H center dot center dot center dot N hydrogen bond involving the amide NH group and the pyridine N atom [N center dot center dot center dot N = 3.0503 (18) A and N-H center dot center dot center dot N = 145.8 (14)degrees] links the molecules into chains extending along the c axis.