Acta Cryst. (2011). E67, m775 [ doi:10.1107/S1600536811018411 ]
Abstract: In the title dinuclear CuII complex, [Cu2(C7H3NO4)2(C12H10N2)(H2O)2]·2H2O, the water-coordinated CuII cation is O,N,O'-chelated by a pyridine-2,6-dicarboxylate (pdc) dianion, and one pyridine N atom from a 1,2-bis(4-pyridyl)ethene ligand coordinates to the CuII cation, completing the CuN2O3 distorted square-pyriamidial geometry. The Cu-Owater bond [2.388 (4) Å] in the axial direction is much longer than the other Cu-O bonds. The 1,2-bis(4-pyridyl)ethene ligand is located across an inversion center with the mid-point of the C=C bond at the inversion center, and bridges two CuII cations, generating a centrosymmetric dinuclear complex. The crystal structure is stabilized by classical O-HO and weak C-HO hydrogen bonds.
Online 20 May 2011
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