IUCr journals

Bis(iminodiethylenediammonium) di-μ5-hydrogenphosphato-pentamolybdate(VI) tetrahydrate

Acta Cryst. (2006). C62, m355–m357 [doi.org/10.1107/S0108270106023092];

[Cations]A packing view along the b axis, showing the arrangement of the [Mo5O15(HPO4)2]4− clusters (polyhedra), the (H2tren)2+ cations and the lattice water molecules in the crystal structure.
The crystal structure of (C4H15N3)2[Mo5O15(HPO4)2]·4H2O is made up of [Mo5O15(HPO4)2]4- anions, C4H15N32+ cations and lattice water molecules. The [Mo5O15(HPO4)2]4- cluster, with approximate C2 symmetry, can be considered as a ring formed by five distorted edge- and corner-sharing MoO6 octahedra, capped on both poles by a hydrophosphate tetrahedron. There exist N−H⋅⋅⋅O, O−H⋅⋅⋅N and C−H⋅⋅⋅O hydrogen bonds between the organic components and the clusters.

Feng Geng, Guo-Hua Han and Bi-Zhou Lin