Received 19 November 2011
There are one and a half independent molecules in the asymmetric unit of the title compound, [Ni(C8H8NO)2], one of which is situated on an inversion center. In both molecules, the NiII ion is coordinated by two O and two N atoms from two Schiff base ligands in an approximate square-planar geometry. Intermolecular N-HO hydrogen bonds link three molecules into centrosymmetric trimer. The crystal packing exhibits weak intermolecular C-HO hydrogen bonds and voids of 37 Å3.
For general background to the use of Schiff bases in coordination chemistry, see: Haikarainen et al. (2001); Miyasaka et al. (2002). For nickel complexes with Schiff base ligands, see: Liu et al. (2006); Wang (2010). For the crystal structure of a similar copper(II) complex, see: Marongiu & Lingafelter (1971).
Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT (Bruker, 2004); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: CV5207 ).
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