Work

Photo-initiated oxidation of C–H bonds by diimine complexes of vanadium( v )

Year: 2021

Type: article

Abstract: 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.

Source: Chemical Communications

DOI: 10.1039/d1cc00649e

Authors: Rui Zhang, Wen Zhou, Jeffrey J. Warren

Institution: Simon Fraser University

Language: English

Topic: Vanadium and Halogenation Chemistry

Subfield: Inorganic Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: green

Funders: Simon Fraser University, China Scholarship Council, Natural Sciences and Engineering Research Council of Canada

Awards: G4523730310, G7029378832