ESR spectra of phenoxyl radicals derived from 2,6-diisobornyl-4-methylphenol

Hypervalent Sulfur Derivatives as Sulfenylating Reagents: Visible-Light-Mediated Direct Thiolation of Activated C(sp2)–H Bonds with Dihalosulfuranes

“…Nonetheless, upon the addition of BHT to the reaction mixture, the doublet was observed in the EPR spectrum ( g = 2.0022 and a H = 0.6 mT), which we attributed to the secondary phenoxyl radical BHT–R. , Overall, these data support the intermediacy of the radical species. Almost no loss in the product yield was observed when the reaction was carried out in an argon atmosphere (85% open to air versus 83% under argon); thus, oxygen does not participate in the reaction.…”

Application of phenolic radicals for antioxidants, as active materials in batteries, magnetic materials and ligands for metal-complexes

“…51 Many of the structurally hindered phenoxyl-radicals have been subject to electron spin resonance (ESR) studies and stability examinations to determine their long-time stability under different temperatures and environments. 52 In related studies phenoxyl-radicals were incorporated in a corannulene to create a curved p-conjugated molecule. As neutral radical phenoxyl proved to be a useful probe for studying intramolecular magnetic interactions in organic molecules.…”