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High-Affinity Proton Donors Promote Proton-Coupled Electron Transfer by Samarium Diiodide
Tesia V Chciuk1, William R Anderson1, Robert A Flowers2
1Department of Chemistry, Lehigh University, 6 E. Packer Ave., Bethlehem, PA, 18015, USA.
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.
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