Reaction and subsequent transformation of anionic acetylide–carbene complexes using the Ph3PAu+ fragment

Elzet Stander; Catharine Esterhuysen; Jean M. McKenzie; Stephanie Cronje; Helgard G. Raubenheimer

doi:10.1039/B708915E

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Reaction and subsequent transformation of anionic acetylide–carbene complexes using the Ph₃PAu⁺ fragment†‡

Elzet Stander,^a Catharine Esterhuysen,^a Jean M. McKenzie,^a Stephanie Cronje^a and Helgard G. Raubenheimer*^a

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^a Department of Chemistry and Polymer Science, University of Stellenbosch, Private Bag X1, Matieland, Stellenbosch, South Africa
E-mail: hgr@sun.ac.za
Fax: +27 (0)21 8083849
Tel: +27 (0)21 8083850

Abstract

The metallated Fischer-type carbene complexes (CO)₅M [double bond, length as m-dash] C(NMe₂)C [triple bond, length as m-dash] CLi (M = Cr, W) react with Ph₃PAuNO₃ to form the β-substituted products (CO)₅MC(NMe₂)CCAuPPh₃. In solution these products isomerise by formal metal fragment exchange to furnish Ph₃PAuC(=NMe₂)CCM(CO)₅. A preliminary kinetic investigation by means of ¹H-NMR spectroscopy indicates an unusual and complicated reaction mechanism. Model DFT calculations predict small energy differences between the products before and after the metal fragment exchange.

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Article information

DOI: https://doi.org/10.1039/B708915E
Article type: Paper
Submitted: 12 Jun 2007
Accepted: 17 Sep 2007
First published: 10 Oct 2007

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Dalton Trans., 2007, 5684-5691

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Reaction and subsequent transformation of anionic acetylide–carbene complexes using the Ph₃PAu⁺ fragment

E. Stander, C. Esterhuysen, J. M. McKenzie, S. Cronje and H. G. Raubenheimer, Dalton Trans., 2007, 5684 DOI: 10.1039/B708915E

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Dalton Transactions