Date Published: May 01, 2009
Publisher: International Union of Crystallography
Author(s): Kong Mun Lo, Seik Weng Ng.
The title stannoxane is a toluene-solvated dimer, [Sn4(C7H6Cl)8Cl2O2(OH)2]·C7H8, the tetranuclear molecule lying across a center of inversion. The Sn4O4 framework, whose two independent Sn atoms show trigonal bipyramidal coordination, is essentially planar (r.m.s deviation = 0.02 Å). One of the two chlorobenzyl groups of the chloridodiorganyltin unit is disordered over two positions with the chlorophenyl residue refined over two positions in a 50:50 ratio. The solvent molecule is disordered about a twofold axis.
The distannoxane is a hydrolysed product of di(4-chlorobenzyl)dichloridotin(IV); for the synthesis of the organotin compound by the direct reaction of 4-chlorobenzyl chloride and metallic tin, see: Shishido et al. (1961 ▶). For octabenzyldichloridodi-μ2-hydroxo-di-μ3-oxo-tetratin, which crystallizes as a toluene disolvate, see: Mohamed et al. (2004 ▶). For octa(4-methylbenzyl)dichloridodi-μ2-hydroxo-di-μ3-oxo-tetratin, see: Wang et al. (2007 ▶).