title: High-Affinity Proton Donors Promote Proton-Coupled Electron Transfer by Samarium Diiodide.
abstract: The relationship between proton-donor affinity for Sm(II) ions and the reduction of two substrates (anthracene and benzyl chloride) was examined. A combination of spectroscopic, thermochemical, and kinetic studies show that only those proton donors that coordinate or chelate strongly to Sm(II) promote anthracene reduction through a PCET process. These studies demonstrate that the combination of Sm(II) ions and water does not provide a unique reagent system for formal hydrogen atom transfer to substrates.
authors.affiliation: Department of Chemistry, Lehigh University, 6 E. Packer Ave., Bethlehem, PA, 18015, USA.
authors.forename: Tesia V
authors.initials: TV
authors.lastname: Chciuk
authors.affiliation: Department of Chemistry, Lehigh University, 6 E. Packer Ave., Bethlehem, PA, 18015, USA.
authors.forename: William R
authors.initials: WR
authors.lastname: Anderson
authors.affiliation: Department of Chemistry, Lehigh University, 6 E. Packer Ave., Bethlehem, PA, 18015, USA. rof2@lehigh.edu.
authors.forename: Robert A
authors.identifier: 0000-0003-2295-1336
authors.initials: RA
authors.lastname: Flowers
keywords: hydrogen-atom transfer; proton donors; proton-coupled electron transfer; reduction; samarium diiodide