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

The title compound, [Cu(C(12)H(8)N(2))(2)](2)[W(6)O(19)], consists of two [Cu(phen)(2)](+) cations (phen = 1,10-phenanthroline) and one typical [W(6)O(19)](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 WO(6) 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—H⋯O 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 π–π stacking inter­actions between neighboring phen ligands. These weak hydrogen bonds and π–π stacking inter­actions lead to a two-dimensional network.