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Visible Light-Induced Oxidation of Alcohols by a Luminescent Osmium(VI) Nitrido Complex: Evidence for the Generation of PhIO + as a Highly Active Oxidant in the Presence of PhIO.
- Source :
-
Journal of the American Chemical Society [J Am Chem Soc] 2023 Apr 26; Vol. 145 (16), pp. 9129-9135. Date of Electronic Publication: 2023 Apr 13. - Publication Year :
- 2023
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Abstract
- Although alcohols are readily oxidized by a variety of oxidants, their oxidation by metal nitrido complexes is yet to be studied. We report herein visible-light-induced oxidation of primary and secondary alcohols to carbonyl compounds by a strongly luminescent osmium(VI) nitrido complex ( OsN ). The proposed mechanism involves initial rate-limiting hydrogen-atom transfer (HAT) from the α-carbon of the alcohol to OsN* . Attempts to develop catalytic oxidation of alcohols by OsN* using PhIO as the terminal oxidant resulted in the formation of novel osmium(IV) iminato complexes in which the nitrido ligand is bonded to a δ-carbon of the alcohol. Experimental and theoretical studies suggest that OsN* is reductively quenched by PhIO to generate PhIO <superscript>+</superscript> , which is a highly active oxidant that readily undergoes α- and δ-C-H activation of alcohols.
Details
- Language :
- English
- ISSN :
- 1520-5126
- Volume :
- 145
- Issue :
- 16
- Database :
- MEDLINE
- Journal :
- Journal of the American Chemical Society
- Publication Type :
- Academic Journal
- Accession number :
- 37053567
- Full Text :
- https://doi.org/10.1021/jacs.3c00760