Higher-order effects in the EPR spectrum of the monodeutero- tert-butyl radicalThe shifts higher than second order predicted by Fessenden for small differences of hyperfine constants are observed in the liquid-phase EPR spectrum of monodeutero-t-butyl. A full analysis of the spectrum is ...
The synthesis of Coppinger's radical (galvinoxyl) with perdeuteriated tert-butyl groups is described. Its EPR spectrum exhibits markedly decreased line widths (0.015 mT) compared with the unlabelled radical (0.039 mT). The correspondingly higher resolution allows a complete analysis of the 13C ...
EPR free radical scavenging activity on superoxide, hydroxyl and tert–butyl hydroperoxide radicals by common hydrophilic antioxidants: effect of mixing and influence of glucose and citric acidOxygen radicalsElectron paramagnetic resonanceAscorbic acidChlorogenic acid...
1. The formation of previously unknown anion-radical complexes of molybdenum with pyrocatechol ligands has been demonstrated. 2. Treatment of 3,6-di-tert-butyl-o-quinone anion-radicals with Cr(CO)6...doi:10.1007/BF00957323S. P. Solodovnikov...
The EPR Spectra of Thiyl Radical Spin Adducts Produced by Photolysis of Disulfides in the Presence of 2,4,6-Tri-tert-butylnitrosobenzene and 5,5-Dimethyl-1-pyrroline N-Oxide. J. Chem. Soc., Perkin Trans. 1992, 2, 1431-1437.Mile, B.; Rowlands, C. C.; Sillmana, P. D.; Fildes,...
We present EPR spin-trapping proof that: (i) EBN is an efficient probe for the analysis of glutathione thiyl radical (GS); (ii) β-cyclodextrins increase the kinetic stability of the spin-adduct EBN/SG; and (iii) in aqueous solutions, EBN does not react with superoxide anion radical (O2...
Absolute rate constants are reported for the addition of the 1-[(tert-butoxy) carbonyl] ethyl (=2-(1,1-dimethylethoxy)-1-methyl-2-oxoethyl) radical to several cyclic and monosubstituted alkenes in MeCN as obtained by time-resolved electron paramagnetic resonance (EPR). The activation energies...
It is found that the evolution of the FT-EPR spectra over a time domain ranging from nanoseconds to 500 μs can be completely explained in terms of: (1) kinetics of radical formation and decay, (2) relaxation of tert-butoxy radical precursors — born with zero spin polarization via the ...
This radical is not stable above about 273 K and is replaced by α-tert-butoxybenzyl tert-butyl nitroxide, aN = 13.62 G, aH = 1.72 G, aoβ = 5.05 G, g = 2.0064.Alkylperoxy radicals are also trapped by 2-methyl-2-nitrosopropane to give alkylperoxy tert-butyl nitroxide aN = 28.7 G...
Shultz DA, Boal AK, Farmer GT (1997) The biradical, bis(3,5-di-tert-butyl-4-phenoxyl)methyleneadamantane, exhibits matrix-dependent EPR spectra suggesting rotamer bistability with differential exchange coupling. J Am Chem Soc 119: 3846–3847...