Poly[[tetra-aqua-di-μ(4)-oxalato-μ(2)-oxalato-dineo-dymium(III)] dihydrate]

• Published in: Acta crystallographica. Section E, Structure reports online Structure reports online, 2012-03, Vol.68 (Pt 3), p.m289-m289
• Main Authors: Cao, Gao-Juan, Rong, Cheng, Li, Qing-Lu, Jiang, Wen-Jing
• Format: Article
• Language: English
• Subjects: Metal-Organic Papers
• ISSN: 1600-5368; 1600-5368
• DOI: 10.1107/S1600536812005016

The title compound, {[Nd(2)(C(2)O(4))(3)(H(2)O)(4)]·2H(2)O}(n), was synthesized hydro-thermally in the presence of bis-(carb-oxy-ethyl-germanium) sesquioxide. It is isostructural with the corresponding Pr compound [Yang et al. (2009). Acta Cryst. E65, m1152-m1153]. The Nd(3+) cation is nine-coordinated and its coordination polyhedron can be described as a distorted tricapped trigonal prism. Two Nd(3+) ions are connected by two O atoms from two oxalate ions to give a dinuclear Nd(2) unit. The unit is further linked to four others via four oxalate ions yielding a layerparallel to (0-11). The linkages between the layers by neighbouring oxalate anions lead to a three-dimensional framework with channels along the c axis. The coordinating and free water mol-ecules are located in the channels and make contact with each other and the host framework by weak O-H⋯O hydrogen bonds.