Acta Cryst. (2007). E63, m2413  [ doi:10.1107/S1600536807040913 ]

Tetraaquabis(4,4'-bipyridine)cobalt(II) 2-aminonaphthalene-1-sulfonate hexahydrate

M.-J. Wu, P.-X. Dai, X.-G. Wang, E.-C. Yang and X.-J. Zhao

Abstract: The title compound, [Co(C₁₀H₈N₂)₂(H₂O)₄](C₁₀H₈NO₃S)₂·6H₂O, contains a tetraaquabis(4,4'-bipyridine)cobalt(II) cation, two ANS^- anions (HANS = 2-aminonaphthalene-1-sulfonic acid) and six solvent water molecules. The Co^II atom lies on an inversion centre and is coordinated octahedrally by two mutually trans 4,4'-bipyridine molecules bound in a monodentate fashion and by four water molecules in the equatorial plane. The cations and water molecules are arranged into infinite two-dimensional layers by an extensive network of hydrogen bonds. The ANS^- anions are trapped between these layers via N-HO interactions between the amino groups and the solvent and coordinated water molecules. Adjacent layers are stacked via weak - interactions between 4,4'-bipyridine molecules [nearest centroid-to-centroid distance 3.662 (0) Å].

Online 22 August 2007

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