An esr and CIDEP study of the photoreduction of chromone and chromanone and their organometallic radical adducts

Abstract

The esr and CIDEP results show that the photoreduction of chromones and chromanones by phenol and by triethylamine proceeds via a spin polarized T(n,π*) triplet state which abstracts a hydrogen atom from the donor. Both chromone and chromanone are found to be reactive to the addition of organometallic radicals to form some radical adducts, including organotin, organosilicon, and organogermane.