Inhibition of the [2 + 2 + 2] Cyclization by the Formation of Chelates

Alkyne and Vinylidene Complexes with Cyclopentadienylcobalt(I)

authored by

Holger Butenschön, Ralf T. Kettenbach, Carl Krüger

Abstract

The trimerization of alkynes to arenes usually observed in the reaction of cyclopentadienyl‐cobalt(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. (Figure Presented.)

External Organisation(s)

Max-Planck-Institut für Kohlenforschung

Type

Article

Journal

Angewandte Chemie International Edition in English

Volume

31

Pages

1052-1054

No. of pages

3

ISSN

0570-0833

Publication date

08.1992

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Catalysis, General Chemistry

Electronic version(s)

https://doi.org/10.1002/anie.199210661 (Access: Closed)
https://doi.org/10.1002/ange.19921040816 (Access: Closed)