Evidence for the formation of triplet 1,3-biradicals on photolysis of cis- and trans-3,4-dimethyl-Δ1-pyrazoline
Abstract
The stereochemistry of the cis- and trans-1,2-dimethylcyclopropanes produced on photolysis of cis-and trans-3,4-dimethyl-Δ1-pyrazoline indicates that triplet biradicals are intermediates; the results also indicate that triplet biradical production becomes more important on photolysis at shorter wavelengths.