A six-coordinated Ni(II) complex, bis(O-ethylxanthato)bis(3,5-dimethylpyridine)nickel(II), [C20H28N2NiO2S4], has been synthesized by the reaction of bis(O-ethylxanthato)nickel(II) with 3,5-dimethylpyridine in acetone. The Ni atom in the title complex is octahedrally coordinated within a trans-N2S4 donor set, with the Ni atom located on a centre of inversion. The structure of the title compound was elucidated by a single-crystal X-ray diffraction method. The compound crystallizes in the triclinic space group P-1 with unit-cell parameters: a = 7.1750(3) Å, b = 9.3864(5) Å, c = 9.6914(4) Å and α = 84.962(4)°, β = 73.017(4)°, γ = 75.172(4)°. The crystal structure was solved by direct methods and refined by full-matrix least-squares procedures to a final R-value of 0.0238 for 2162 observed reflections. The asymmetric unit comprises half a molecule. The pyridine ring is coplanar, and is held almost perpendicular to the dithiocarbonato group. Molecules in the crystal are packed together to form layers.
Key words: Octahedral coordination, direct methods, crystal structure; bis(O-ethylxanthato)bis(3,5-dimethylpyridine)nickel(II)
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