Synthesis, structures and catalytic properties of chelating N,N
′-bis(silylated) 1,2-benzenediamidozirconium(IV) chlorides [and a titanium(IV) analogue] and dimethylamides
†
Abstract
Chelating diamido CH2) or L2− (X = Me), were used to prepare di(amido)metal(IV) chlorides [{M(Cl)L′(μ-Cl)(thf
)}2] (M = Zr 2 or Ti 3), ZrCl2(L′) 5 and [ZrCl2(L)(tmen)] 6 and the heteroleptic
)2], while [Li2(L)(tmen)2] and ZrCl4 furnished 6. Treatment of Zr(NMe2)4 with an equivalent portion of H2L′ or H2L gave 4 and 7, respectively. Complex 5 was obtained from 4 and Si(Cl)Me3, and with thf yielded 2. The crystal structures of 2, 4, 6 and 7 have been determined. Compounds 2 and 4–6, unlike the less active titanium complex 3, were active