Hexaaquazinc(II) 3-carboxy-4-hydroxybenzenesulfonate tetrahydrate

Abstract

In the title compound, [Zn(H2O)6]L2·4H2O, where HL = 3-carboxy-4-hydroxy­benzene­sulfonic acid (C7H6O6S), each ZnII cation lies on an inversion center and is octahedrally coordinated by six water mol­ecules. The L− anions do not coordinate to zinc, but act as counter-anions. The crystal structure is composed of alternating layers of [Zn(H2O)6]2+ cations and sulfonate anions. The [Zn(H2O)6]2+ cations, water mol­ecules and L− anions are connected through a complex pattern of hydrogen-bonding interactions.