Acta Cryst. (2004). E60, m171-m173  [ doi:10.1107/S160053680400011X ]

Bis(3,5-dimethylpiperazinium) di-₅-hydrogenphosphato-penta-₂-oxo-pentakis[dioxomolybdenum(V)] dihydrate

X.-M. Zhang, R.-Q. Fang, H.-S. Wu and S. W. Ng

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 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.

Online 17 January 2004

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