catena-Poly[[[tetra­aqua­zinc(II)]-μ-4,4′-bipyridine] bis­(4-hydroxy­benzene­sulfonate) trihydrate].

In the title compound, {[Zn(C₁₀H₈N₂)(H₂O)₄](C₆H₅O₄S)₂·3H₂O} _n, the Zn atom, the bipyridine ligand and one of water mol­ecules are located on twofold rotation axes. The Zn atom is coordinated by four O atoms from four water mol­ecules and two N atoms from two 4,4′-bipyridine mol­ecules in a distorted octa­hedral geometry. The Zn²⁺ ions are linked by the 4,4′-bipyridine mol­ecules to form a one-dimensional straight chain propagating along the c axis. The 4-hydroxy­benzene­sulfonate counter-ions are bridged by the solvent water mol­ecules through hydrogen bonds to generate a two-dimensional layer featuring large pores. In the crystal packing, the intra­layer pores form one-dimensional channels along the c axis, in which the one-dimensional [Zn(C₁₀H₈N₂)(H₂O)₄]²⁺ chains are encapsulated. Electrostatic inter­actions between cations and anions and extensive hydrogen bonds result in a three-dimensional supra­molecular structure. [ABSTRACT FROM AUTHOR]