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American Chemical Society, Journal of the American Chemical Society, 34(130), p. 11262-11263, 2008

DOI: 10.1021/ja803729k

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An Unusally Diverse Array of Products Formed upon Carbonylation of a Dialkylniobium Complex

Journal article published in 2008 by Neil C. Tomson, Andrew Yan, John Arnold ORCID, Robert G. Bergman
This paper is available in a repository.
This paper is available in a repository.

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Abstract

The reaction of carbon monoxide with a beta-diketiminato dimethyl niobium complex (BDI)Me2Nb(NtBu) is shown to lead to a variety of products whose distribution displays a remarkable dependence on the reaction conditions. Among these, the products of metal reduction, enediolate formation, and intramolecular C-H activation have been fully characterized. An investigation into the individual steps leading to these products points to a transient initial monoacyl complex, whose fate may be perturbed via reaction conditions to allow for control over the product distribution. Furthermore, the reaction of (BDI)Me2Nb(NCMe3) with XylNC (Xyl = 2,6-Me2C6H3) yields the eta2-ketimine complex (BDI)(Me2C=NXyl)Nb(NCMe3), whose characterization and reactivity enhance our understanding of the sequences involving CO.