Cerium(IV) and samarium(II) are two traditional outer-sphere redox reagents, the former being a very strong oxidant and the latter a very strong reductant. We have been developing their inner-sphere reactivity, in which oxidation or reduction is coupled with proton transfer. One section of the talk will focus on the chemistry of small ceria nanocrystals, CeO<sub>2-x</sub>, suspended in hydrocarbon solvents. The reactivity of oxidized ceria with hydrogen atom donors (proton-electron donors), such as hydroquinone, will be discussed. Samarium diiodide with water ligands should be a good hydrogen atom (electron/proton) donor, so we have been exploring reactions that can proceed by H-atom transfer but not electron transfer.<br/>

Proton-coupled electron transfer reactivity of ceria and samarium diiodide

251st National Meeting (2016)

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