27490-25-1Relevant academic research and scientific papers
Synthesis and characterization of configurationally stable diorganotin(IV) complexes with tin as a chiral centre
Knoll, Susanne,Tschwatschal, Frank,Gelbrich, Thomas,Ristau, Thomas,Borsdorf, Rolf
, p. 1959 - 1967 (2008/10/09)
Contrary to the high optical stability of tetraorganotin compounds most heteroleptic organic tin compounds are configurationally instable. We report the synthesis and the characterization of some new enantiomeric and diastereomeric diorganotin(IV) complexes of stable configuration with tin as a chiral centre. The stabilization of the chiral tin atom was realized by complexation with tridentate diacidic esterhydrazone ligands H2L, which prevent an interconversion at the stereogenic centre. Multinuclear NMR-studies in solution demonstrate, that the configuration of the chiral tin center is configurationally stable up to 160°C. The molecular structure of the complexes Neophyl-phenyl-tin-2[(2-methyl-mercaptothiocarbonyl)-hydrazono]propionate IIb and (2-Methyl-butyl-1-yl)-phenyl-tin-[S-methyl-β-N-(2-salicylmethylidene) thiocarbazate] IIIg have been determined by single crystal X-ray diffraction analysis.
