A Synthetic Route to a Molecular Galloxane Dihydroxide and Its Group 4 Heterobimetallic Compounds

Controlled hydrolysis of MeLGaCl2 (MeL = HC­[(CMe)­N­(2,4,6-Me3C6H2)]2–) (1) in the presence of a N-heterocyclic carbene, as a HCl acceptor, led to the unprecedented molecular galloxane dihydroxide [{MeLGa­(OH)}2(μ-O)] (2) in high yield. Compound 2 was used in the assembly of the heterobimetallic galloxanes with group 4 metals [{(MeLGa)2(μ-O)}­(μ-O)2{M­(NR2)2}] (M = Ti, R = Me (6); M = Zr (7), Hf (8), R = Et).