A @PT07460@ of aryl or acyl @E02219@ to give the [1,3]-rearranged product (as well as the [1,5]-rearranged product):
P04614.png
Source: PAC, 1996,
68, 2223. (
Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2261 [
Terms] [
Paper]