... (c) Berg- mann, E. D.; Cineberg, D.; Pappo, R. In Organic Reactiom; Aduna ... in our earlier finding of a methyl migration in the photochem- istry of the (diphenylviny1)tetramethylcyclopropane 1 cited above in eq 1. Equation 3 summarizes the overall photo- chemistry of the ... J. Org. ...