Copper(I)−Olefin Complexes: The Effect of the Trispyrazolylborate Ancillary Ligand in Structure and Reactivity

The spectroscopic and structural characteristics and the relative reactivity of several TpMsCu(olefin) (olefin = ethylene, 1, 1-hexene, 2, allyl ethyl ether, aee, 3, cyclohexene, 4, and styrene, 5) complexes bearing the bulky hydrotris(3-mesitylpyrazolyl)borate ligand have been examined. Experimenta...

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Bibliographic Details
Published in:Organometallics 2010-08, Vol.29 (16), p.3481-3489
Main Authors: Martín, Carmen, Muñoz-Molina, José María, Locati, Abel, Alvarez, Eleuterio, Maseras, Feliu, Belderrain, Tomás R, Pérez, Pedro J
Format: Article
Language:English
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Summary:The spectroscopic and structural characteristics and the relative reactivity of several TpMsCu(olefin) (olefin = ethylene, 1, 1-hexene, 2, allyl ethyl ether, aee, 3, cyclohexene, 4, and styrene, 5) complexes bearing the bulky hydrotris(3-mesitylpyrazolyl)borate ligand have been examined. Experimental data, including an unusual high-field chemical shift in the 1H and 13C NMR spectra, and DFT theoretical calculations support the proposal that the copper−olefin linkage is mainly sustained by σ-donation, lacking a substantial degree of π-back-donation.
ISSN:0276-7333
1520-6041
DOI:10.1021/om1002705