Van der Merwe Kina, Visser Hendrik G, Venter J A
Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein 9330, South Africa.
Acta Crystallogr Sect E Struct Rep Online. 2010 Jul 24;66(Pt 8):m1011-2. doi: 10.1107/S1600536810028990.
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.
在标题配合物(C₅H₆N)[Cr(CH₄O₆P₂)₂(H₂O)₂]·4H₂O中，位于对称中心的Cr(III)原子，以扭曲的八面体配位几何构型，由两个双齿亚甲基二膦酸酯配体和两个水分子配位。吡啶鎓阳离子位于对称中心，一个N原子和一个C原子各自以半占据的形式共享一个位置。通过吡啶鎓阳离子、配合物阴离子和未配位水分子之间的O—H⋯O、N—H⋯O和C—H⋯O氢键构建了三维网络。
