A new diamantane functionalized tris(aryloxide) ligand system for small molecule activation chemistry at reactive uranium complexes

The diamantane functional ized triazacyclononane ligand ((Dia)ArOH)(3)tacn (L(3)) has been synthesized and the reactivity of its U(III) metallated product [(((Dia)ArO)(3)tacn)U] (1) has been explored. Complex 1 promotes dichloromethane and azidotrimethylsilane activation to generate U(IV) complex [(((Dia)ArO)(3)tacn)U(Cl] (2) and U(V) complex 1(((Dia)ArO)(3)tacn)U(NTMS)] (3), respectively. Spectroscopic investigations of complexes 1, 2, and 3 will be discussed, along with molecular structures where possible (C) 2010 Published by Elsevier Masson SAS on behalf of Academic des sciences