Bis(4,4′-bipyridine-κN)bis(hydrogen phthalato)-κ2O,O′;κO-zinc(II)

The title compound, [Zn(C 8 H 5 O 4 ) 2 (C 10 H 8 N 2 ) 2 ], was obtained by the hydrothermal reaction of ZnSO 4 .7H 2 O with phthalic acid (H 2 pht) and 4,4'-bipyridine (4,4'-bipy). Crystallographic analysis shows that it has a one-dimensional double-chain structure via hydrogen-bonding interactions. Each Zn II atom, adopting a distorted tetrahedral geometry, is coordinated by two N atoms from two 4,4'-bipy ligands, with Zn-N distances of 2.054 (4) and 2.104 (4) A, and by two O atoms from symmetry-related Hpht- ligands, with Zn-O distances of 1.921 (4) and 2.019 (4) A.