Acta Cryst. (2008). E64, m1572-m1573  [ doi:10.1107/S1600536808037513 ]

Octa-n-butyl-1²C,2²C,3²,4²C-bis(-2,3-dibromopropionato)-1:2²O:O',3:4²O:O'-bis(2,3-dibromopropionato)-1O,3O-di-₃-oxido-1:2:4³O:O:O,2:3:4³O:O:O-tetratin(IV)

Y. F. Win, S. G. Teoh, S. T. Ha, R. Kia and H.-K. Fun

Abstract: In the centrosymmetric tetranuclear title complex, [Sn₄(C₄H₉)₈(C₃H₃Br₂O₂)₄O₂], one of the two independent Sn atoms is five-coordinated by one O atom of the carboxylate anion, two bridging O atoms and two n-butyl groups in a C₂SnO₃ distorted trigonal bipyramidal geometry. The other Sn atom also has a distorted trigonal bipyramidal geometry, being coordinated by two O atoms of two carboxylate anions, one bridging O atom and two butyl groups. An interesting feature of the crystal structure is the short SnO [2.756 (4) Å] and OO [2.608 (3) Å] interactions. The -BrCH₂-CHBr- segments of the two carboxylate anions are disordered over two positions [site occupancies of 0.60 (1)/0.40 (1) and 0.53 (2)/0.47 (2)]. Weak non-directional C-HO interactions lead to the formation of infinte chains along the a axis; other weak intermolecular C-H interactions are also present.

Online 20 November 2008

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