Transition metal complexes with thiosemicarbazide-based ligands. XLII. Bis(S-methylisothiosemicarbazido-N1, N4)bis(pyrazole-N2)-nickel(II) diiodide.

In the title compound, [Ni(C(2)H(7)N(3)S)(2)(C(3)H(4)N(2))(2)]I(2), the Ni(II) ion assumes a centrosymmetric distorted octahedral geometry. The two molecules of S-methylisothiosemicarbazide are coordinated as bidentate ligands via the terminal N atoms, forming five-membered chelate rings. The I atoms are approximately in the equatorial plane of the chelate rings at a similar distance from both. The five-membered chelate rings are almost planar and exhibit flattened envelope conformations. There is a weak intermolecular interaction between the lone pair of electrons of the S atom and the center of the pyrazole ring.