(5-Pentamethylcyclopentadienyl)tin(II) Tetrakis(pentafluorophenyl)borate: A New Cocatalyst for the Polymerization of ![]()
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- 作者：Barrie Rhodes ; James C. W. Chien ; and Marvin D. Rausch
- 刊名：Organometallics
- 出版年：1998
- 出版时间：May 11, 1998
- 年：1998
- 卷：17
- 期：10
- 页码：1931 - 1933
- 全文大小：36K
- 年卷期：v.17,no.10(May 11, 1998)
- ISSN：1520-6041
文摘
The organotin compound(
5-pentamethylcyclopentadienyl)tin tetrakis(pentafluorophenyl)borate(1)has been synthesized from a reaction between (pentamethylcyclopentadienyl)tin chloride and lithiumtetrakis(pentafluorophenyl)borate. This cation proved tobean effective Ziegler-Natta 
-olefin cocatalyst.Activitiesfor ethylene polymerizations using dimethylzirconoceneand 1 were 7.3 × 105 g of PE/(mol of1·[C2H4]·h) at20
deg.gif">C and 1.2 × 106 g of PE/(mol of1·[C2H4]·h) at 70deg.gif">C.This system was also effective for the polymerizationofpropylene. Activities usingrac-ethylenebis(indenyl)dimethylzirconium with the tin cation were 3.0 × 105gof PP/(mol of1·[C3H6]·h).Activities increased markedlywhen using zirconocenedichlorides/tri(i-butyl)aluminum/1. Activities for ethylene polymerizationusingzirconocenedichloride/tri(i-butyl)aluminum/1 at 20deg.gif">Cwere 7.0 × 106 g of PE/(mol of1·[C2H4]·h).Activitiesfor the polymerization of propylene usingrac-ethylenebis(indenyl)zirconiumdichloride/tri(i-butyl)aluminum/1at 20 deg.gif">C were 5.4 × 106 g of PP/(mol of1·[C3H6]·h).
5-pentamethylcyclopentadienyl)tin tetrakis(pentafluorophenyl)borate(1)has been synthesized from a reaction between (pentamethylcyclopentadienyl)tin chloride and lithiumtetrakis(pentafluorophenyl)borate. This cation proved tobean effective Ziegler-Natta -olefin cocatalyst.Activitiesfor ethylene polymerizations using dimethylzirconoceneand 1 were 7.3 × 105 g of PE/(mol of1·[C2H4]·h) at20deg.gif">C and 1.2 × 106 g of PE/(mol of1·[C2H4]·h) at 70deg.gif">C.This system was also effective for the polymerizationofpropylene. Activities usingrac-ethylenebis(indenyl)dimethylzirconium with the tin cation were 3.0 × 105gof PP/(mol of1·[C3H6]·h).Activities increased markedlywhen using zirconocenedichlorides/tri(i-butyl)aluminum/1. Activities for ethylene polymerizationusingzirconocenedichloride/tri(i-butyl)aluminum/1 at 20deg.gif">Cwere 7.0 × 106 g of PE/(mol of1·[C2H4]·h).Activitiesfor the polymerization of propylene usingrac-ethylenebis(indenyl)zirconiumdichloride/tri(i-butyl)aluminum/1at 20 deg.gif">C were 5.4 × 106 g of PP/(mol of1·[C3H6]·h).