Acta Cryst. (2009). E65, m1103-m1104  [ doi:10.1107/S1600536809032255 ]

Dichlorido{₃-6,6'-diethoxy-2,2'-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenolato}octamethyldi-₃-oxido-tetratin(IV)

S. M. Lee, K. M. Lo and S. W. Ng

Abstract: In the title tetranuclear tin(IV) complex, [Sn₄(CH₃)₈(C₂₀H₂₂N₂O₄)Cl₂O₂], there are three completely different tin-atom coordinations. One metal atom (site symmetry 2) adopts a distorted pentagonal-bipyramidal SnC₂N₂O₃ coordination arising from the N,N',O,O'-tetradentate deprotonated Schiff base, two methyl groups in the axial sites and a ₃-O atom that also bonds to two further Sn atoms. Two symmetry-equivalent Sn atoms adopt very distorted SnC₂O₄ arrangements that could be described as pentagonal-bipyramidal with one equatorial vertex missing and the C atoms in the axial site. The final Sn atom (site symmetry 2) adopts an SnC₂Cl₂O trigonal-bipyramidal arrangement, with Cl atoms in the axial sites. As well as the two Sn atoms, one O atom lies on a twofold rotation rotation axis, and another is disordered about the axis. The terminal ethoxy group is disordered over two sets of sites with equal occupancy.

Online 19 August 2009

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