Synthesis and Crystal Structure of Bis(O-ethyldithiocarbonato)bis(4-ethylpyridine)nickel(II)

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The crystal structure of bis(O-ethyldithiocarbonato-κ²S,S′)bis(4-ethylpyridine-κN) nickel(II) [Ni(S₂COCH₂CH₃)₂(NC₅H₄-CH₂CH₃)₂] has been elucidated by a single-crystal X-ray diffraction method. The complex crystallizes in the orthorhombic space group Pbca with unit-cell parameters a = 14.174(5), b = 17.153(5), c = 20.496(5)Å. The crystal structure was solved by direct methods and refined by full-matrix least-squares procedures to a final R-value of 0.0571 for 2621 observed reflections. The two pyridine rings are coplanar and are held almost perpendicular to the dithiocarbonato groups. The compound has a trans octahedral geometry. Packing is stabilized by C-H…S intermolecular hydrogen bonding.