Acta Cryst. (2008). E64, m173  [ doi:10.1107/S1600536807065506 ]

Bis{-2,2'-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenolato}dinickel(II)

Y. Ding, Z. Ku, L. Wang, Y. Hu and Y. Zhou

Abstract: The asymmetric unit of the title compound, [Ni₂(C₁₆H₁₄N₂O₂)₂], contains an Ni^II cation which is coordinated by two imine N atoms and by two phenolate O atoms of the salen ligand {salen = N,N'-bis(salicylidene)ethane-1,2-diamine or 2,2'-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenol}, leading to a distorted square-planar conformation. When a secondary Ni-O interaction > 2.41 Å to the neighbouring phenolate O atom is considered, two molecules are linked into a centrosymmetric dimer with an overall square-pyramidal coordination for the Ni^II cation. Weak - interactions with a shortest interplanar distance of 3.704 Å help to stabilize the crystal structure.

Online 12 December 2007

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