Acta Cryst. (2005). E61, m2528-m2530  [ doi:10.1107/S1600536805035907 ]

Tetrakis(₂-3-hydroxypyridine-2-carboxylato-²O,N)di-₃oxo-tetrakis[dimethyltin(IV)]

G.-R. Tian, R.-F. Zhang, C.-L. Ma and S. W. Ng

Abstract: In the crystal structure of the title centrosymmetric distannoxane, [Sn₄(CH₃)₈(C₆H₄NO₃)O₂], one 3-hydroxypyridine-2-carboxylate ligand chelates through N and O atoms to an Sn atom. A singly bonded carboxylate O atom coordinates weakly to another independent Sn atom [at a distance of 2.983 (4) Å], which is pseudo-chelated by the other 3-hydroxypyridine-2-carboxylate ligand [SnN 2.846 (4) Å]. The ₃-binding mode of both ligands leads to a skew-trapezoidal bipyramidal geometry [C-Sn-C 136.0 (3)°] for the six-coordinate Sn atom and a trans-pentagonal bipyramidal geometry [C-Sn-C 148.9 (3)°] for the seven-coordinate Sn atom.

Online 10 November 2005

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