TY - JOUR
T1 - Reactivity of group 4 benzamidinate complexes towards mono- and bis-substituted silanes and 1,5-hexadiene
AU - Volkis, Victoria
AU - Averbuj, Claudia
AU - Eisen, Moris S.
N1 - Funding Information:
We thank the Technion V.P.R. Fund for the promotion of Research at the Technion for support of this work. V.V. thanks the Institute of Catalysis at the Technion for the postdoctoral support.
PY - 2007/4/15
Y1 - 2007/4/15
N2 - Zirconium and titanium bis(benzamidinate) dimethyl complexes were found to be active catalytic precursors for the oligomerization of mono- and bis-substituted silanes. The activation of such complexes, by an excess of MAO or by an equimolar amount of B(C6F5)3, increases the catalytic activity of the complexes and the molecular weight of the obtained oligosilanes. The maximum polymerization index that was accomplished (n = 90) is by far the largest obtained with other organometallic complexes. In addition, the activated benzamidinate catalysts were also found to be active for the polymerization of 1,5-hexadiene producing poly(methyl-1,3-cyclopentane). For the latter, the results obtained with C2-symmetry bis(benzamidinate) dimethyl complexes were compared with a chiral complex bearing a myrtanyl group at the benzamidinate ligand.
AB - Zirconium and titanium bis(benzamidinate) dimethyl complexes were found to be active catalytic precursors for the oligomerization of mono- and bis-substituted silanes. The activation of such complexes, by an excess of MAO or by an equimolar amount of B(C6F5)3, increases the catalytic activity of the complexes and the molecular weight of the obtained oligosilanes. The maximum polymerization index that was accomplished (n = 90) is by far the largest obtained with other organometallic complexes. In addition, the activated benzamidinate catalysts were also found to be active for the polymerization of 1,5-hexadiene producing poly(methyl-1,3-cyclopentane). For the latter, the results obtained with C2-symmetry bis(benzamidinate) dimethyl complexes were compared with a chiral complex bearing a myrtanyl group at the benzamidinate ligand.
KW - Benzamidinate complexes
KW - Chiral complexes
KW - Dehydrogenative coupling of silanes
KW - Polymethylcyclopentane
KW - Polysilanes
UR - http://www.scopus.com/inward/record.url?scp=33947583909&partnerID=8YFLogxK
U2 - 10.1016/j.jorganchem.2007.01.002
DO - 10.1016/j.jorganchem.2007.01.002
M3 - 文章
AN - SCOPUS:33947583909
SN - 0022-328X
VL - 692
SP - 1940
EP - 1950
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
IS - 10
ER -