1-Cyclo-hexyl-3-{(E)-[1-(pyridin-2-yl)ethyl-idene]amino}-thio-urea.

In the title thio-urea derivative, C(14)H(20)N(4)S, the non-ring non-H atoms are approximately planar, with an r.m.s. deviation of 0.0720 Å. The pyridine ring is twisted out of this plane and makes a dihedral angle of 16.85 (13)° with it. The mean plane passing through the cyclo-hexyl ring is almost normal to the central plane [dihedral angle = 69.23 (8)°]. An intra-molecular N-H⋯N(imine) hydrogen bond occurs. Centrosymmetric dimers are formed in the crystal structure via pairs of N-H⋯S hydrogen bonds, and these are connected into a supra-molecular chain along the a axis via C-H⋯π(pyrid-yl) inter-actions.