Abstract
AbstractTracer techniques involving 14C‐benzoyl peroxide have been used to compare the reactivities at 60°C. of various phenylethylenes towards the benzoyloxy radical. Two general procedures have been used. One involves a study of the effect of the unsaturated compound upon the yield of carbon dioxide during decomposition of benzoyl peroxide in benzene. The other depends upon determination of the relative numbers of benzoyloxy and phenyl end‐groups in polymers and co‐polymers. The velocity constants for addition of the reference radical to styrene, trans‐stilbene, cis‐stilbene, 1:1‐diphenylethylene, triphenylethylene, and tetraphenylethylene are in the proportions 2.6:12.4:8.3:7.3:11.7:0.
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