Mechanistic roles of metal- and ligand-protonated species in hydrogen evolution with [Cp*Rh] complexes.

ABSTRACT: Protonation reactions involving organometallic complexes are ubiquitous in redox chemistry and often result in the generation of reactive metal hydrides. However, some organometallic species supported by η⁵-pentamethylcyclopentadienyl (Cp*) ligands have recently been shown to undergo ligand-centered protonation by direct proton transfer from acids or tautomerization of metal hydrides, resulting in the generation of complexes bearing the uncommon η⁴-pentamethylcyclopentadiene (Cp*H) ligand. Here, time-resolved pulse radiolysis (PR) and stopped-flow spectroscopic studies have been applied to examine the kinetics and atomistic details involved in the elementary electron- and proton-transfer steps leading to complexes ligated by Cp*H, using Cp*Rh(bpy) as a molecular model

SUBMITTER: Henke WC 

PROVIDER: S-EPMC10214172 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature