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