The mixed-metal species [Gd2Zr6(μ4-O)2(μ-OAc)6(μ-OPri)10(OPri)10] (1) was obtained by reacting anhydrous gadolinium acetate with [Zr(OPri)4(PriOH)]2. Its X-ray structure analysis reveals two Zr3Gd(μ4-O)(μ-OAc)2(OPri)10tetrahedral clusters associated via Gdμ-OAc linkages. The zirconium and gadolinium centres are hexa- and hepta-coordinated, respectively. The analogous yttrium derivative (2) was obtained by a similar route and characterized by microanalysis, IR,1H and13C NMR spectroscopies. Control of the stoichiometry between the metals can be achieved by varying the nature of the alkoxo group. Hydrolysis-polycondensation reactions proceed via differential hydrolysis and offered cubic zirconia containing various amounts of lanthanide oxides depending on the stoichiometry between the metals. © 1993.
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