om9508086_si_001.pdf (689.68 kB)
Facile Conversion of an Appended Silylamido to a Silyloxy Ligand via Isocyanate Elimination. Synthesis of {[(C5Me4)SiMe2O]Zr(η2-O2CMe)(μ-O2CMe)}2 via the Carboxylation of [(C5Me4)SiMe2(N-t-Bu)]ZrMe2
journal contribution
posted on 1996-01-09, 00:00 authored by Lioba Kloppenburg, Jeffrey L. PetersenThe reaction of 2 equiv of CO2 with
[(C5Me4)SiMe2(N-t-Bu)]ZrMe2 proceeds with
the formation of
{[(C5Me4)SiMe2(N-t-Bu)]Zr(η2-O2CMe)(μ-O2CMe)}2
(2),
which reacts with additional CO2 to afford
{[(C5Me4)SiMe2O]Zr(η2-O2CMe)(μ-O2CMe)}2
(3) with the concomitant elimination of OCN-t-Bu. The formation
of
OCN-t-Bu was confirmed by a combination of
GC/MS
and IR measurements; the molecular structures of 2
and
3 were determined by X-ray crystallography.