Acta Cryst. (2006). E62, m2648-m2650  [ doi:10.1107/S1600536806037160 ]

catena-Poly[[aquacalcium(II)]bis(-1H-imidazole-4-carboxylato)-⁴N,O:O,O';³O,O':O']

W. Starosta and J. Leciejewicz

Abstract: The structure of the title compound, [Ca(C₄H₃N₂O₂)₂(H₂O)]_n, is composed of molecular ribbons in which the Ca^II ions are bridged by two symmetry-independent imidazole-4-carboxylate ligands. Each Ca^II ion is coordinated by the N,O-bonding group of one ligand, two carboxylate O atoms of the other ligand, an O atom of the coordinated water molecule and three bridging carboxylate O atoms donated by both ligands. The coordination polyhedron of the Ca^II ion (coordination number 8) is a bicapped pentagonal bipyramid with a strongly deformed equatorial plane. The ribbons are held together by a network of hydrogen bonds.

Online 20 September 2006

Copyright © International Union of Crystallography
IUCr Webmaster