Issue 44, 2011
From the journal:

Chemical Communications

Reactions of a quintuply bonded chromium dimer with alkynes†

Jingmei Shen,a   Glenn P. A. Yap,a   Jan-Philipp Wernerb  and  Klaus H. Theopold*a  

* Corresponding authors

a Department of Chemistry and Biochemistry, Center for Catalytic Science and Technology, University of Delaware, Newark, USA
E-mail: theopold@udel.edu
Fax: +1 302 831-6335
Tel: +1 302 831-1546

b Institut für Anorganische und Angewandte Chemie, Universität Hamburg, Hamburg, Germany
E-mail: jan-philipp.werner@chemie.uni-hamburg.de
Tel: +49 (0)40 42838 3112

Abstract

Quintuply bonded [HLiPrCr]2 reacts with alkynes RC[triple bond, length as m-dash]CR (R = Me, Et, Ph, CF3) to form exclusively 1 : 1 adducts [HLiPrCr]2(RCCR). All products feature relatively short Cr–Cr distances (1.919–1.962 Å) and elongated C–C bonds (1.315–1.436 Å), consistent with [2+2] cycloaddition reactions. The hydrocarbon adducts are 4-membered metallacycles, the bridging alkynes of which are progressively skewed with respect to the Cr–Cr axis. In contrast, perfluoroalkyne adds across the metal ligand moiety.

Graphical abstract: Reactions of a quintuply bonded chromium dimer with alkynes

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Article information

DOI
https://doi.org/10.1039/C1CC15218A
Article type
Communication
Submitted
22 Aug 2011
Accepted
28 Sep 2011
First published
11 Oct 2011

Chem. Commun., 2011,47, 12191-12193

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Reactions of a quintuply bonded chromium dimer with alkynes

J. Shen, G. P. A. Yap, J. Werner and K. H. Theopold, Chem. Commun., 2011, 47, 12191 DOI: 10.1039/C1CC15218A

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