Aqueous Hydricity of Late Metal Catalysts as a Continuum Tuned by Ligands and the Medium.

ABSTRACT: Aqueous hydride transfer is a fundamental step in emerging alternative energy transformations such as H2 evolution and CO2 reduction. "Hydricity," the hydride donor ability of a species, is a key metric for understanding transition metal hydride reactivity, but comprehensive studies of aqueous hydricity are scarce. An extensive and self-consistent aqueous hydricity scale is constructed for a family of Ru and Ir hydrides that are key intermediates in aqueous catalysis. A reference hydricity is determined using redox potentiometry and spectrophotometric titration for a particularly water-soluble species. Then, relative hydricity values for a range of species are measured using hydride transfer equilibria, taking advantage of expedient new synthetic procedures for Ru and Ir hydrides. This lar

SUBMITTER: Pitman CL 

PROVIDER: S-EPMC4768292 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature