INHIBITION OF THE [2+2+2] CYCLIZATION BY THE FORMATION OF CHELATES - ALKYNE AND VINYLIDENE COMPLEXES WITH CYCLOPENTADIENYLCOBALT(I)

被引：43

作者：

BUTENSCHON, H ^{[1
]}

KETTENBACH, RT ^{[1
]}

KRUGER, C ^{[1
]}

机构：

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

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH | 1992年 / 31卷 / 08期

关键词：

D O I：

10.1002/anie.199210661

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The trimerization of alkynes to arenes usually observed in the reaction of cyclopentadienylcobalt(I) complexes with alkynes could be prevented by chelation of the metal center with a "phosphane arm" on the cyclopentadienyl ligand. Instead alkyne complexes were obtained in very good yields. The reaction with ethyne leads to the vinylidene complex 1 (88% yield), a possible precursor to the carbene-cobalt complex.

引用

页码：1066 / 1068

页数：3

共 15 条

[1] METAL HYDRIDE ALKYNYL -] METAL VINYLIDENE REARRANGEMENTS OCCURRING IN BOTH SOLID-STATE AND SOLUTION - ROLE OF THE 1-ALKYNE SUBSTITUENT IN DETERMINING THE RELATIVE STABILITY OF PI-ALKYNE, HYDRIDE ALKYNYL, AND VINYLIDENE FORMS AT COBALT [J].