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Acta Cryst. (2009). E65, i32 [ doi:10.1107/S160053680901201X ]
Abstract: The title salt, diaquatetramanganese(II) oxalate bis[orthophosphate(V)], Mn4(C2O4)(PO4)2(H2O)2, was synthesized hydrothermally and displays a three-dimensional framework structure. The asymmetric unit consists of two different MnII centers, half of an oxalate anion, a phosphate group and a coordinated water molecule. A crystallographic inversion center is located at the mid-point of the oxalate C-C bond. The distorted octahedral MnO6 and the tetragonal pyramidal MnO5 centers are linked through bridging oxalate and phosphate groups. The water molecule also has a weaker bonding contact to the five-coordinate Mn atom, which consequently exhibits a distorted octahedral geometry and also bridges the independent Mn atoms. The water molecule is a donor for intra- and intermolecular O-H
O hydrogen bonds.
Online 2 April 2009
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