title: Bis[bis-(1,10-phenanthroline-κN,N')copper(I)] μ(6)-oxido-dodeca-kis-μ(2)-oxido-hexa-oxidohexa-tungsten(VI).
abstract: 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 tetra-hedral geometry. The hexa-tungstate anion, lying on an inversion center and possessing the well known Lindqvist structure, is formed by six edge-sharing WO(6) octa-hedra, thus exhibiting an approximate O(h) symmetry. Three kinds of O atoms exist in the hexa-tungstate, 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 inter-planar distances of 3.485 (1) and 3.344 (1) Å indicate π-π stacking inter-actions between neighboring phen ligands. These weak hydrogen bonds and π-π stacking inter-actions lead to a two-dimensional network.
authors.affiliation: College of Materials Science and Chemical Engineering, Jinhua College of Profession and Technology, Jinhua, Zhejiang 321017, People's Republic of China.
authors.forename: Zhen-Fang
authors.initials: ZF
authors.lastname: Li
authors.forename: Bi-Song
authors.initials: BS
authors.lastname: Zhang
authors.forename: Chang-Sheng
authors.initials: CS
authors.lastname: Wu