Tris main group complexes

Two principle strategies have been employed for the synthesis of siloxide-containing molecular precursors. The first involves a silanolysis, or condensation, reaction of the Si - OH groups with a metal amido, alkyl, hahde, or alkoxide complex. The second method involves salt metathesis reactions of an alkali metal siloxide with a metal hahde. Much of our work has been focused on formation of tris(tert-butoxy)siloxide derivatives of the early transition metals and main group elements. The largely imexplored regions of the periodic table include the lanthanides and later transition metals. 

B. Main Group Homoleptic Tris(dithiolene) Complexes / 92... 

The tetrahedrally coordinated complex [Fe HB(Bu Im)3 Br] is isostructural to the main group compound [Mg HB(Bu Im)3 Br] [403] and the transition metal compound [Co HB(Bu Im)3 Cl] [404], The smaller main group cation Li+ combined with the smaller tris-NHC ligand HB(EtIm)3 surprises us with a dinuclear [Li3 HB(EtIm)3 3] complex... 

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