A new hybrid organic-inorganic chain: [(phen)Cu-µ-(κ2O:O'-VP2O10H3)2-Cu(phen)]n.

The structure of the title compound, poly[(dihydrogenphosphato-κO)(µ(3)-hydrogenphosphato)di-µ-oxido-(1,10-phenanthroline)copper(II)vanadium(V)], [CuV(HPO(4))(H(2)PO(4))O(2)(C(12)H(8)N(2))](n), is defined by [(phen)Cu-µ-(κ(2)O:O'-VP(2)O(10)H(3))(2)-Cu(phen)] units (phen is 1,10-phenanthroline), which are connected to neighbouring units through vanadyl bridges. Neighbouring chains have no covalent bonds between them, although they interdigitate through the phen groups via π-π interactions.