Poly[[[ bis[(2,2′-bipyridine-κ2N,N′)cadmium(II)]-bis[μ3-3-(4-carboxylatophenoxy)propionato-κ5O,O′:O′:O",O"′]] 4-hydroxybenzoic acid monohydrate]

The 3-(4-carboxylatophenoxy) propionate dianion in the title compound, [Cd-2(C10H8O5)(2)(C10H8N2)(2)]center dot C7H6O3 center dot H2O, linksadjacent metal atoms into a chain, the dianion chelating through both O atoms of its two -CO2- end groups. One of the carboxylate O atoms (that belonging to the aliphatic carboxylate end) engages in interchain coordination, linking two chains into a ribbon. The ribbons are linked to the disordered water molecule and 4-hydroxybenzoic acid by O-H center dot center dot center dot O hydrogen bonds, further consolidating the ribbon motif. The Cd-II atom exists in a seven-coordinate CdN2O5 enviroment that approximates to a monocapped octahedron. The dinuclear repeat unit is centrosymmetric.