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—H⋯O and weak C—H⋯O hydrogen bonds.
Highlights
In the title dinuclear CuII complex, [Cu2(C7H3NO4)2(C12H10N2)(H2O)2]Á2H2O, the water-coordinated CuII cation is O,N,O0-chelated by a pyridine-2,6-dicarboxylate 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 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
Symmetry codes: (ii) x+1, y, z; (iii) −x+1, −y+1, −z+2; (iv) x, y+1, z; (v) −x, −y+2, −z+2; (vi) x−1, y, z; (vii) x−1, y−1, z; (viii) −x+2, −y+1, −z+1
Summary
Key indicators: single-crystal X-ray study; T = 295 K; mean (C–C) = 0.007 A; R factor = 0.054; wR factor = 0.126; data-to-parameter ratio = 11.9. In the title dinuclear CuII complex, [Cu2(C7H3NO4)2(C12H10N2)(H2O)2]Á2H2O, the water-coordinated CuII cation is O,N,O0-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 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—HÁ Á ÁO and weak C—HÁ Á ÁO hydrogen bonds. Related literature For related CuII complexes with pyridine-2,6-dicarboxylate ligands, see: Chaigneau et al (2004); Dong et al (2010); Ghosh et al (2004)
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