Heterometallic aggregates as intermediates on the molecular routes to multicomponent oxides

Metal alkoxides are often associated with more accessible precursors such as carboxylates, nitrates, β -diketonates, in chemical routes to multicomponent oxides. The molecular constitution of such solutions has been examined for systems based on niobium or zirconium. The heterometallic aggregates MNb2(μ-OAc)2μ-OR4(OR)6 (M = Cd, Mg), PbZr3(μ4-0)(μ-OAc)2(μ-OR)5(OR)5 and Bd2Zr6(μ4-0)2(μ-OAc)6(μ-OR)10(OR)10 R = iPr have been characterized by X-ray diffraction. In this paper preliminary results on the hydrolysis experiments of these aggregates are given