C and Hg nuclear magnetic resonance spectroscopic study of alkenemercurinium ions: Effect of methyl substituents on Hg chemical shifts.
The long-lived ethylene, cyclohexene, and norbornenemercurinium ions prepared in superacidic, low-nucleophilic media have been studied by (13)C and (199)Hg NMR spectroscopy. The norbornenemercurinium ion shows temperature-dependent (13)C and (199)Hg NMR spectra, consistent with equilibration via rapid hydride and Wagner-Meerwin shifts. The (199)Hg NMR shifts of a series of alkylmercury bromides were also obtained in order to elucidate the effect of methyl substituents on (199)Hg NMR chemical shifts.
Olah
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Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90007.
Garcia-Luna
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