title: Pyridinium diaqua-bis-(methyl-enediphospho-nato-κO,O')chromate(III) tetra-hydrate.
abstract: In the title complex, (C(5)H(6)N)[Cr(CH(4)O(6)P(2))(2)(H(2)O)(2)]·4H(2)O, the Cr(III) atom, lying on an inversion centre, is coordinated by two bidentate methyl-ene diphospho-nate ligands and two water molecules in a distorted octa-hedral coordination geometry. The pyridinium cation is located on an inversion centre, with an N atom and a C atom sharing a position each at a half occupancy. A three-dimensional network is constructed by O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds between the pyridin-ium cation, complex anion and uncoordinated water mol-ecules.
authors: Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein 9330, South Africa.
authors: Kina
authors: K
authors: Van der Merwe
authors: Hendrik G
authors: HG
authors: Visser
authors: J A
authors: JA
authors: Venter
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