Bis(3,5-dimethylpiperazinium) di-μ5-hydrogenphosphato-penta-μ2-oxo-pentakis[dioxomolybdenum(V)] dihydrate

Abstract

The dications and tetraanion in the title compound, (C6H16N2)2[Mo5O15(HPO4)2]·2H2O, occupy special positions in the crystal structure. One of the independent cations lies on a site of \overline 1 symmetry and the other lies on a site of 2 symmetry. The tetraanion, which has 2 site symmetry, consists of a five-unit ring of vertex/edge-sharing MoO6 octahedra; the ring is capped by two P(OH) units on opposite sides. The anions are linked via hydrogen bonds involving the H atom of the hydrogenphosphate group into a zigzag chain running along the c axis. The chains are incorporated into the network structure through hydrogen bonds involving the cations and lattice water mol­ecules.