Crystal structure of a CoII coordination polymer: catena-poly[[μ-aqua-bis-(μ-2-methyl-propano-ato)-κ2O: O';κ2O: O-cobalt(II)] monohydrate]

Acta Crystallogr E Crystallogr Commun. 2017 Feb 3;73(Pt 3):318-321. doi: 10.1107/S2056989017001360. eCollection 2017 Mar 1.

Abstract

In the title cobalt(II) coordination polymer with isobutyrate ligands, {[Co{CH(CH3)2CO2}2(H2O)]·H2O} n , the Co2+ ion is hexa-coordinated in a slightly distorted octa-hedral coordination environment defined by two O atoms from two bridging water mol-ecules and four O atoms from four bridging carboxyl-ate ligands. The carboxyl-ates adopt two different coordination modes, μ-(κ2O:O') and μ-(κ2O:O), forming a one-dimensional polymeric chain extending along [010]. The intra-chain cobalt⋯cobalt separation is 3.2029 (2) Å. The polymeric chains are linked by hydrogen bonds involving the water mol-ecules of solvation, giving a two-dimensional network structure lying parallel to (100).

Keywords: cobalt carboxyl­ates; cobalt(II) isobutyrate dihydrate; coordination polymer; crystal structure; polynuclear complexes.