Partial and exhaustive hydrolysis of lanthanide N,N-dialkylcarbamato complexes. A viable access to lanthanide mixed oxides

Partial and exhaustive hydrolysis of lanthanide N,N-dialkylcarbamato complexes, [Ln(O2CNR2)3] have been carried out in organic solvents. The tetranuclear derivatives [La4O(O2CNiPr2)10], [La4(CO3)(O2CNBu2)10] and the species [Ln2(CO3)(O2CNiPr2)4] (Ln = Nd, Eu, Gd) have been obtained. Exhaustive hydrolysis of [Ln(O2CNR2)3] (Ln = Nd, Tb, R = Bu; Ln = Eu, Gd, R = iPr, Bu) produced hydrated lanthanide carbonates, Ln2(CO3)3·nH2O. The hydrolysis of mixtures of cerium and lanthanum or cerium and terbium N,N-dibutylcarbamato complexes allowed the preparation of mixed oxides containing the two metals in the desired molar ratio.73