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Acta Cryst. (2007). E63, m2262 [ doi:10.1107/S1600536807036938 ]

Hexaaquazinc(II) 3-ammonionaphthalene-1,5-disulfonate tetrahydrate

D. J. Genther, P. J. Squattrito, K. Kirschbaum and A. A. Pinkerton

Abstract: The title compound, [Zn(H₂O)₆][H₃NC₁₀H₅(SO₃)₂]₂·4H₂O (Zn site symmetry $\overline{1}$ ), is isostructural with its nickel(II) and cobalt(II) analogues. An extensive network of N-HO and O-HO hydrogen bonds involving the ammonio group, water molecules, and sulfonate O atoms helps to establish the packing. One of the uncoordinated water molecules is disordered over at least two sites (modelled over two positions with site occupancy ratio ca 2:1).