Iron Photoredox Catalysis as an Effective Tool for Organic Synthesis via Visible‐Light‐Induced Homolysis (VLIH)

Abstract Owing to its possible advantages for the environment and the economy, photoredox catalysis of organic processes fueled by iron has garnered a lot of interest recently. The potential for photo‐induced single‐electron transfer (SET) events occurring outside of the sphere is now well acknowledged. Currently, the focus has shifted to a newly discovered photoactivation method that is based on an inner‐sphere mode of reactivity caused by a population of visible‐light‐induced homolysis (VLIH) states. VLIH activation, in contrast to photoredox, is specific to iron complexes, offers distinct reactivity profiles, and does not require redox potentials to coincide. These attractive properties have prompted the development of strategies that use this blueprint to manufacture highly reactive open‐shell species in mild environments. The purpose of this contribution is to promote the development of novel synthetic techniques for sustainable chemical transformations and to offer an educational instrument for the understanding of this evolving idea.