catena-Poly[[diaquazinc(II)]-micro-4,4'-sulfonyldibenzoato-kappa2O:O'].

The title compound, [Zn(C(14)H(8)O(6)S)(H(2)O)(2)](n), is the first reported metal complex of the 4,4'-sulfonyldibenzoate anion. The structure comprises zigzag chains of alternating [Zn(H(2)O)(2)](2+) and sulfonyldibenzoate units, the central Zn and S atoms of which lie on crystallographic twofold axes. The Zn(II) centre occupies a strongly distorted tetrahedral environment [O-Zn-O = 83.