Abstract
Ligand-stabilized copper(I) hexafluoroacetylacetonate complexes display varying degrees of stability to oxidation and thermal decomposition. In an effort to understand the nature of the copper-alkene bond in these complexes better, 1H and 13C nuclear magnetic resonance spectra were obtained and compared to the spectra of the free alkene. In accord with Dewar-Chatt-Duncanson theory, the extent of π and σ bonding contributions can be qualitatively determined by the observed chemical shift changes upon complexation of the alkene to the copper(I) center.
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