Synthesis of new six-coordinate complexes of silicon(IV)

Abstract

The synthesis of new six-coordinate tris-bidentate complexes of silicon(IV) is reported. Two methods of synthesis have been used, the normal procedure using SiCl 4 and a novel method using Si(OEt) 4 in the presence of a strong acid. This new route has shown to be preferential for making such compounds in general. The complexes have been characterized by 1H and 29Si NMR spectrometry in DMSO, elemental analysis and FAB + mass spectrometry. Facial and meridional isomerism was normally slow on the NMR time scale and in some cases the rates of isomerism were recorded. Complexes derived from the 3-hydroxypyridin-4-ones were found to be water stable.