Synthesis of the first examples of stable heterometallic isopropoxides of an organometallic RSn(IV) moiety

Nine heterometallic isopropoxides containing butyltin(IV) moiety are prepared via metathesis reactions of either butyltin trichloride or an appropriate butyltin(IV) chloride–isopropoxometallate derivative with suitable potassium isopropoxome-tallates in desired molar ratios. All these derivatives are thermally stable and have been characterized by spectral studies.