Titanium Complexes Incorporating 1,1-Bis(<i>tert</i>-butylamido)-1-silacycloalkane Ligands: Generation of Alkyl Derivatives and Reactivity toward Molecular Oxygen
作者:Sung-Joon Kim、Dong-Woong Choi、Young-Joo Lee、Byung-Hoon Chae、Jaejung Ko、Sang Ook Kang
DOI:10.1021/om034174b
日期:2004.2.1
methoxy-bridged diamidotitanium(IV) dimers. Reaction of 2 with 2 equiv of PhCH2MgBr yielded the corresponding dibenzyl (Bn2) derivatives of titanium (cycl)Si(NBut)2TiBn2 (9). When these dibenzyl complexes were used as precursors for the conversion of monomeric to dimeric alkoxy-bridged species, oxo insertion did not occur, presumably because formation of the alkoxy-bridged dimer was hampered by the presence
已经合成并充分表征了一系列甲氧基桥接的二氨基钛二聚物。用(化学式)2:1或1:1的(cycl)Si(NBu t)2 TiCl 2(2 ;循环= C n H 2 n,n = 3-5)处理格氏试剂MeMgBr得到四配位的二甲基钛(环)Si(NBu t)2 TiMe 2(3)和一甲基钛(CH 2)3 Si(NBu t)2 TiMeCl(5)分别。这些配合物与双氧的后续反应是通过将一个氧分子插入3和5的Ti-C键中而进行的,从而生成各自的甲氧基桥连的钛二聚体[(cycl)Si(NBu t)2 Ti(μ-OMe)Me ] 2(4)和[(环)Si(NBu t)2 Ti(μ-OMe)Cl] 2(6)。相反,二氯化钛(IV)络合物(CH 2)3 Si(NBu t)2 TiCl 2(2a)与O 2的反应由于自氧化作用形成了容易形成的Si-O-Ti键,因此得到了肼基物种[(NBu t NBu t)(CH 2)3
Sterically Controlled Silacycloalkyl Diamide Complexes of Titanium(IV): Synthesis, Structure, and Catalytic Behavior of (cycl)Si(NBu<i><sup>t</sup></i>)<sub>2</sub>TiCl<sub>2</sub> [(cycl)Si = Silacyclobutane, Silacyclopentane, Silacyclopentene, and Silacyclohexane]
作者:Sung-Joon Kim、Il Nam Jung、Bok Ryul Yoo、Sang Hern Kim、Jaejung Ko、Dongjin Byun、Sang Ook Kang
DOI:10.1021/om000740g
日期:2001.5.1
potential catalysts for the polymerization of ethylene. While sterically less demanding silacyclobutyl and -pentyl diamide complexes (3a and 3b) exhibit low ethylenepolymerization activity (4.0−5.8 kg PE molcat-1 h-1) in the presence of methylalumoxane, the highly puckered silacyclohexyl diamide complex 3c shows better activity (14 kg PE molcat-1 h-1) for ethylenepolymerization when it is activated with
13C, 15N and 29Si nuclear magnetic resonance studies of some aminosilanes and aminodisilanes
作者:Bernd Wrackmeyer、Carin Stader、Hong Zhou
DOI:10.1016/0584-8539(89)80188-6
日期:——
Syntheses, Structural Characterizations, and Metathesis Studies of New Dimeric Group 14 Metal Complexes Derived from Silacycloalkyl Diamide
作者:Sung-Joon Kim、Young-Joo Lee、Sang Hern Kim、Jaejung Ko、Sungil Cho、Sang Ook Kang
DOI:10.1021/om020587l
日期:2002.11.1
which showed that all are composed of cycloadducts of two monomeric units. The reactions of 2 with AlCl3 in toluene at roomtemperature afforded the unusual dinuclear aluminum complexes [(cyclo)Si(tBuN)2(AlCl2)2] (4). The complexes 4 were converted to the dimethyl complexes of the type [(cyclo)Si(tBuN)2(AlMe2)2] (5) with MeMgBr. Complexes 4b and 5c were characterized by X-ray crystallography. As a result