Acta Cryst. (2009). E65, m167-m168  [ doi:10.1107/S1600536808044267 ]

catena-Poly[[diaquacalcium(II)]-di--2-chloronicotinato]

L. Quan, H. Yin, L. Cui and M. Yang

Abstract: The itle compound, [Ca(C₆H₃ClNO₂)₂(H₂O)₂]_n, contains polymeric chains extending along [100] that are generated by inversion centres. The Ca²⁺ ions are bridged by 2-chloronicotinate groups and exhibit an eight-coordination by six carboxylate O atoms of four different 2-chloronicotinate ligands and two O atoms of water molecules. In the crystal structure, intermolecular O-HO, O-HN and C-HO hydrogen bonds result in the formation of a supramolecular network structure. The - contacts between the 2-chloronicotinate rings [centroid-centroid distances = 3.875 (3) and 3.701 (3) Å] may further stabilize the structure.

Online 10 January 2009

Copyright © International Union of Crystallography
IUCr Webmaster