Crystal structure of poly[[{μ₂-1,4-bis[(1H-imidazol-1-yl)methyl]benzene}[μ₆-5-(4-carboxylatophenoxy)isophthalato]-μ₃-hydroxido-dicobalt(II)] 0.25-hydrate]

Abstract

The title coordination polymer, {[Co 2 (C 15 (17) , respectively. Four neighbouring Co 2+ ions are linked by six carboxylate groups and two 3 -OH ligands, forming a butterfly-shaped secondary building unit (SBU). These SBUs are connected by L 3À anions into layers parallel to (110). Adjacent layers are cross-linked by the bix ligands, forming a three-dimensional framework that has a bimodal (3,8)-connected tfz-d topology. The disordered lattice water molecule is located in the voids of the framework and has OÁ Á ÁO and OÁ Á ÁN contacts of 2.81 (2) and 2.95 (2) Å , suggesting medium-strength hydrogen bonds. The title compound may be a good candidate for artificial eye lenses.