ORGANOMETALLIC COMPOUNDS OF GROUP 3 .47. FORMATION OF ION-PAIRS IN THE ZIEGLER ETHYLENE POLYMERIZATION CATALYST SYSTEM CP2TI(CL)CH2SIME3-ALCL3

被引：88

作者：

EISCH, JJ ^{[1
]}

CALDWELL, KR ^{[1
]}

WERNER, S ^{[1
]}

KRUGER, C ^{[1
]}

机构：

[1] MAX PLANCK INST COAL RES, W-4330 MULHEIM, GERMANY

来源：

ORGANOMETALLICS | 1991年 / 10卷 / 10期

关键词：

D O I：

10.1021/om00056a003

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Monitoring the interaction of ((trimethylsilyl)-methyl)titanocene chloride with aluminum chloride in polar halocarbons by H-1, C-13, and Al-27 NMR spectroscopy has yielded direct spectral evidence for the generation of equilibrating solvent-separated and contact ion pairs, Cp2Ti(CH2SiMe3)+ and AlCl4-. Such ion pairs are effective catalysts for the polymerization of ethylene, and as required by this action, Me3Si fragments from the titanocene component are incorporated into the linear, high-density polyethylene formed. X-ray diffraction data on ((trimethylsilyl)methyl)titanocene chloride (space group P2(1)/n; R = 0.042; R(w) = 0.050; rho(max) = 0.43 e/angstrom 3) reveal an unusually short Ti-CH2 bond (2.162 angstrom) and an anti conformational arrangement of the Me3SiCH2 group with the Ti-Cl bond.

引用

页码：3417 / 3419

页数：3

共 15 条

[11] METALLOCENE DERIVATIVES OF EARLY TRANSITION-METALS .4. CHEMISTRY OF THE COMPLEXES [M(ETA-C5H5)2RR'] [M=TI, ZR, OR HF- R= CH2M'ME3 (M'=C, SI, GE, OR SN) OR CH(SIME3)2- R' = CL OR ALKYL] AND THE X-RAY STRUCTURES OF [ZR(ETA-C5H5)2(CH2M'ME3)2] (M'=C OR SI) [J].