期刊
CHEMICAL COMMUNICATIONS
卷 57, 期 33, 页码 4007-4010出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1cc00649e
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资金
- Natural Sciences and Engineering Research Council (NSERC) [RGPIN 05559, 06272]
- Simon Fraser University
- China Scholarship Council
The photochemical activation of carbon-hydrogen bonds by vanadium(v)-dioxo and vanadium(v)-oxo-peroxo diimine complexes allows for the rapid oxidation of organic substrates with weak C-H bonds, requiring dioxygen for substrate consumption.
The photochemical activation of carbon-hydrogen bonds by vanadium(v)-dioxo and vanadium(v)-oxo-peroxo diimine complexes is described. Reactions were carried out using a selection of organic substrates with C-H bond dissociation free energy values between 70 and 97 kcal mol(-1). The ability to activate C-H bonds using vanadium(v)-dioxo and vanadium(v)-oxo-peroxo diimine complexes varies with different bond dissociation free energy. Compounds with weaker C-H bonds are oxidized in minutes, rather than in days for thermal oxidations by the corresponding complexes. Dioxygen is necessary for substrate consumption, which suggests that the electronically excited V complexes are radical reaction initiators via H-atom abstraction from the organic substrate.
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