Acta Cryst. (2007). E63, m2203-m2204  [ doi:10.1107/S160053680702884X ]

Reinvestigation of layered poly[aquasodium(I) [[aquasamarium(III)]-di--aqua-₃-pyridine-2,6-dicarboxylato-₂-pyridine-2,6-dicarboxylato] trihydrate]

K. Ikarashi, Z. Taoyun, K. Uematsu, K. Toda and M. Sato

Abstract: The crystal structure of the title compound, {[NaSm(C₇H₃NO₄)₂(H₂O)₄]·3H₂O}_n, was first reported by van Albada, Gorter & Reedijk [(1999), Polyhedron, 18, 1821-1824]. It has now been reinvestigated and confirmed from single-crystal data, giving greater understanding of the role of the water molecules. The two-dimensional layers found in the compound are built up from six-coordinate NaO₆ polyhedra and nine-coordinate SmN₂O₇ polyhedra. The former share edges with each other along the c axis and the latter are bridged by carboxylate groups of pyridine-2,6-dicarboxylate anions along the b axis. Eight-membered rings of water molecules, connected to one another by hydrogen bonding, are formed in the interlayer spaces.

Online 25 July 2007

Copyright © International Union of Crystallography
IUCr Webmaster