Acta Cryst. (2011). E67, m775  [ doi:10.1107/S1600536811018411 ]

[-1,2-Bis(4-pyridyl)ethene-²N:N']bis[aqua(pyridine-2,6-dicarboxylato-³O²,N,O⁶)copper(II)] dihydrate

S. F. Lush

Abstract: In the title dinuclear Cu^II complex, [Cu₂(C₇H₃NO₄)₂(C₁₂H₁₀N₂)(H₂O)₂]·2H₂O, the water-coordinated Cu^II 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 Cu^II cation, completing the CuN₂O₃ distorted square-pyriamidial geometry. The Cu-O_water 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 Cu^II 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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