Poly[[aqua-[μ(2)-1,3-bis-(pyridin-4-yl)urea-κ(2)N(4):N(4')]bis-(μ(3)-5-tert-butyl-isophthalato-κ(3)O(1):O(1'):O(3))dizinc(II)] trihydrate], a double-strand coordination polymer.

In the title compound, {[Zn(2)(C(12)H(12)O(4))(2)(C(11)H(10)N(4)O)(H(2)O)]·3H(2)O}(n), monoperiodic coordination polymer double strands are held into the triperiodic crystal structure by means of N-H⋯O hydrogen-bonding patterns between the amide groups of the 1,3-di(pyridin-4-yl)urea ligands and unligated O atoms belonging to 5-tert-butyl-isophthalate ligands. One of the Zn atoms displays a tetra-hedral coordination environment, while the other Zn atom adopts a five-coordinate geometry inter-mediate between square pyramidal and trigonal bipyramidal. Additionally, O-H⋯O hydrogen-bonding patterns involving the water mol-ecules of crystallization serve as a structure-stabilizing element by aggregating the double-strand motifs.