Evidence for the free radical chain follows from the observed photostimulation and initiation by AIBN or Bz202, the inhibitory effect of di-tert-butyl nitroxide, and the rearrangement of R= As-hexenyl to cyclopentylcarbinyl. The photostimulated reactions proceed more readily with R= tert-butyl than for R= isopropyl and more rapidly with 2'alkylmercurials than with 1" alkylmercurials. This reactivity sequence appears to reflect the efficiencies of the steps in ...
