Acta Cryst. (2010). E66, m1406-m1407  [ doi:10.1107/S1600536810040146 ]

Bis(₂-4-amino-3-nitrobenzoato)bis(4-amino-3-nitrobenzoato)octabutyldi-₃-oxido-tetratin(IV)

Y.-F. Win, C.-S. Choong, S.-G. Teoh, J. H. Goh and H.-K. Fun

Abstract: The tetranuclear molecules of the title compound, [Sn₄(C₄H₉)₈(C₇H₅N₂O₄)₄O₂], reside on a crystallographic inversion center. Both the two independent Sn atoms are five-coordinate, with distorted trigonal-bipyramidal geometries. One Sn atom is coordinated by two O atoms of the carboxylate anions, one bridging O atom and two butyl groups and the other Sn atom is coordinated by an O atom of the carboxylate anion, two bridging O atoms and two butyl groups. All the butyl groups are equatorial with respect to the SnO₃ trigonal plane. The molecular structure is stabilized by intramolecular N-HO hydrogen bonds. In the crystal, pairs of intermolecular bifurcated acceptor N-HO and C-HO hydrogen bonds link the molecules into chains along [10]. Weak intermolecular C-H and - interactions [centroid-centroid distance = 3.713 (2) Å] are also observed.

Online 13 October 2010

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