Photo-triggered hydrogen atom transfer from an iridium hydride complex to unactivated olefins.

ABSTRACT: Many photoactive metal complexes can act as electron donors or acceptors upon photoexcitation, but hydrogen atom transfer (HAT) reactivity is rare. We discovered that a typical representative of a widely used class of iridium hydride complexes acts as an H-atom donor to unactivated olefins upon irradiation at 470 nm in the presence of tertiary alkyl amines as sacrificial electron and proton sources. The catalytic hydrogenation of simple olefins served as a test ground to establish this new photo-reactivity of iridium hydrides. Substrates that are very difficult to activate by photoinduced electron transfer were readily hydrogenated, and structure-reactivity relationships established with 12 different olefins are in line with typical HAT reactivity, reflecting the relative stabilities of ra

SUBMITTER: Schreier MR 

PROVIDER: S-EPMC8163408 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature