Abstract
AbstractPlots of logarithms of relative reaction rates of chromyl chloride oxidation and of chromic acid oxidation of alkenes (log krel values) versus alkene ionization potentials (IPs) and versus their highest occupied molecular orbital energy levels (HOMOs) demonstrate excellent correlations. Each plot has a similar appearance and shows a single line with a positive slope. The results indicate that the rate‐determining step of each title reaction involves an electrophilic attack on the alkene π‐bond without significant steric effects; this supports a proposed 2 + 3 cycloaddition mechanism and disfavors a proposed stepwise 2 + 2 cycloaddition mechanism. Comparison is made with other d0 transition metal complexes that oxidize alkenes. Copyright © 2004 John Wiley & Sons, Ltd.
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