Abstract
Normal 0 A six-coordinated Ni(II) complex, bis( O -ethylxanthato)bis(3, 5-dimethylpyridine)nickel(II), [ C 20 H 28 N 2 NiO 2 S 4 ], has been synthesized by the reaction of bis( O -ethylxanthato)nickel(II) with 3,5-dime thyl pyridine in acetone. The Ni atom in the title complex is octahedrally coordinated within a trans-N 2 S 4 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) A , b = 9.3864(5) A , c = 9.6914(4) A 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.
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