Bis[1,2-bis-(4--butyl-phen-yl)ethyl-ene-1,2-di-thiol-ato(1-)]nickel(II) pentane 0.25-solvate.

The title compound, [Ni(CHS)], , is a square-planar -symmetric compound that occurs on a general position in non-centrosymmetric tetra-gonal 422 (No. 92) with ¼ eq of -pentane (CH) as co-crystallite. Intra-ligand bond lengths show the di-thiol-ene ligands to be in their half-oxidized radical monoanionic form.