Molecular structure design based on Lewis acid–base interaction in the preparation of bimetallic alkoxides derived from two electronegative elements. The synthesis and X-ray single crystal study of Mo2Ta4O8(OMe)16 and Mo4Ta2O8(OiPr)14

Complex formation between molybdenum and tantalum alkoxides has been achieved via activation of the homometallic species, both being Lewis acids, by either partial hydrolysis or partial thermolysis in hydrocarbon media. The crystal structures of the products formed, Mo2Ta4O8(OMe)16 (I) and Mo4Ta2O8(OiPr)14 (II) respectively, are described.