A one-dimensional helical chain polymer:catena-poly[[[bis(1H-imidazole)zinc(II)]-μ-3-carboxylatophenoxyacetato] trihydrate]

In the title one-dimensional polymer, {[Zn(3-CPOA)(C3H4N2)2]·3H2O}n (3-CPOA2− is the 3-carboxyl­atophenoxy­acetate dianion, C9H6O5), the Zn atom shows tetra­hedral coordination, as it is linked to two N atoms from two imidazole mol­ecules and two carboxyl­ate O atoms from two different 3-CPOA2− groups. Adjacent Zn atoms are linked by 3-CPOA2− ligands into a helical chain. The chains are linked into a three-dimensional network by hydrogen bonds.