(μ-Oxalato-κO,O:O,O)bis-[bis-(2,2'-bipyridine-κN,N')cobalt(II)] μ(6)-oxido-dodeca-μ(2)-oxido-hexa-oxido-hexa-tungstate(VI).

The asymmetric unit of the title compound, [Co(2)(C(2)O(4))(C(10)H(8)N(2))(4)][W(6)O(19)], consists of one half of the complex Co(2)(C(2)O(4))(C(10)H(8)N(2))(4) cation and one half of the Lindqvist-type W(6)O(19) isopolyanion. Both constituents are completed by crystallographic inversion symmetry. In the dimeric cation, the Co(II) atom is surrounded in a distorted octa-hedral coordination by four N atoms from two chelating 2,2'-bipyridine ligands and by two O atoms from the chelating oxalate anion. The Lindqvist-type anion exhibits the characteristic W-O bond-length distribution, with the shortest bonds being the W-O(terminal) bonds and the longest being those to the central O atom.