Acta Cryst. (2008). E64, m56  [ doi:10.1107/S1600536807058230 ]

catena-Poly[[[tetraaquasamarium(III)]-di--isonicotinato-⁴O:O'] chloride]

K.-J. Wu, L.-Z. Cai, G. Xu, G.-W. Zhou and G.-C. Guo

Abstract: In the structure of the title compound, {[Sm(C₆H₄NO₂)₂(H₂O)₄]Cl}_n, the unique Sm^III atom lies on a crystallographic twofold axis and is eight-coordinated by four O atoms from four isonicotinate ligands and four water molecules in a slightly distorted square-antiprismatic coodination environment. The Sm^III atoms are bridged by two carboxylate groups of two isonicotinate ligands, forming an extended chain along the c-axis direction. These chains are cross-linked through hydrogen bonds, forming a three-dimensional framework, with channels which accommodate the chloride anions.

Online 6 December 2007

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