An intermediate in the aryl halide photocyclization process detected by flash photolysis
Abstract
A Transient intermediate which decays in a first-order process with k= 12.6 sā1 in the photochemical cyclization of 5-(2-chlorophenyl)-1,3-diphenylpyrazole has been observed; because of the relatively long lifetime this is probably a cyclohexadienyl radical.