Acta Cryst. (2009). E65, m741-m742  [ doi:10.1107/S1600536809020170 ]

Bis[bis(1,10-phenanthroline-²N,N')copper(I)] ₆-oxido-dodecakis-₂-oxido-hexaoxidohexatungsten(VI)

Z.-F. Li, B.-S. Zhang and C.-S. Wu

Abstract: The title compound, [Cu(C₁₂H₈N₂)₂]₂[W₆O₁₉], consists of two [Cu(phen)₂]⁺ cations (phen = 1,10-phenanthroline) and one typical [W₆O₁₉]^2- isopolyanion. The Cu^I atom is coordinated by four N atoms from two bidentate chelating phen ligands in a distorted tetrahedral geometry. The hexatungstate anion, lying on an inversion center and possessing the well known Lindqvist structure, is formed by six edge-sharing WO₆ octahedra, thus exhibiting an approximate O_h symmetry. Three kinds of O atoms exist in the hexatungstate, viz. terminal O_a, bridging O_b and central O_c atoms. Besides the electrostatic effects between the anions and cations, weak C-HO hydrogen bonds exist between the phen ligands and O_a or O_b atoms. The mean interplanar distances of 3.485 (1) and 3.344 (1) Å indicate - stacking interactions between neighboring phen ligands. These weak hydrogen bonds and - stacking interactions lead to a two-dimensional network.

Online 6 June 2009

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