| Popis: |
Rates of decarboxylation (k CO2 R ) have been estimated for the acyloxy radicals formed in the photolysis of substituted 1-naphthylmethyl alkanoates. These rates are based on a proposed mechanism involving initial carbon-oxygen homolytic bond cleavage from the excited singlet state. The products are formed by two competing pathways: electron transfer in the radical pair to give an ion pair and decarboxylation. Measured product yields along with an estimate of the electron-transfer rate (k ET ) allow calculation of k CO2 R as a function of R. The values obtained are the following (R, k (10 9 s −1 )): CH 3 |
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