Acta Cryst. (2007). E63, m1246-m1248  [ doi:10.1107/S1600536807013888 ]

Octamethyl-1²C,2²C,3²C,4²C-bis(₂-2-methylpyrazine-5-carboxylato)-1:2²O:O;3:4²O:O-bis(2-methylpyrazine-5-carboxylato)-1O,4O-di-₃-oxido-1:2:3³O:O:O;2:3:4³O:O:O-tetratin(IV) hexahydrate

J.-Y. Li, W. T. A. Harrison and T.-J. Li

Abstract: The title compound, [Sn₄(CH₃)₈(C₆H₅N₂O₂)₄O₂]·6H₂O, is a hydrated cluster containing four Sn atoms, built up by inversion symmetry around the central Sn₂O₂ ring. The Sn-atom coordination geometry might be regarded as very distorted SnO₃C₂ trigonal-bipyramidal or possibly as grossly distorted SnO₃C₂N octahedral. All the cluster non-H atoms, with the exception of the Sn-bonded methyl groups, lie on a mirror plane. Two of the water-molecule O atoms have m site symmetry; the other occupies a twofold rotation axis.

Online 6 April 2007

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