Reactions of the phenyl-substituted five-membered titanacyclocumulene - Unusual coupling of a 1,4-disubstituted 1,3-butadiyne with two titanium atoms

被引：34

作者：

Burlakov, VV ^{[1
]}

Peulecke, N ^{[1
]}

Baumann, W ^{[1
]}

Spannenberg, A ^{[1
]}

Kempe, R ^{[1
]}

Rosenthal, U ^{[1
]}

机构：

[1] UNIV ROSTOCK,MAX PLANCK GESELL,ARBEITSGRP KOMPLEXKATALYSE,D-18055 ROSTOCK,GERMANY

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 1997年 / 536卷 / 1-2期

关键词：

alkyne; diyne; metallocenes; early transition metals; titanium; group; 4; metallacycle; trimethylsilyl; X-ray diffraction;

D O I：

10.1016/S0022-328X(96)06694-6

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The reaction of Cp2Ti(eta(2)-Me3SiC2SiMe3) with equimolar amounts of PhC=C-C=CPh gives the unstable five-membered titanacyclocumulene 1, which is stabilized by dimerization to yield the dinuclear complex 2. In this reaction complex 1 shows an equilibrium and also behaves as a metallacyclocumulene and a metal alkyne complex. By the coupling of the internal double bond of the cyclocumulene with a complexed triple bond of the diyne, a complex with fused titanacyclopentadiene and titanacyclopentene is formed. With acetone and water complex 1 reacts like an alkyne complex to give the titanadihydrofuran 4 and the titanoxane 5. Complex 2 was investigated by an X-ray structural determination. (C) 1997 Published by Elsevier Science S.A.

引用

页码：293 / 297

页数：5

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