Electron spin resonance -active organic radicals

Electron donor-acceptor complexes, electron transfer in the thermal and photochemical activation of, in organic and organometallic reactions, 29, 185 Electron spin resonance, identification of organic free radicals, 1, 284 Electron spin resonance, studies of short-lived organic radicals, 5, 23 Electron storage and transfer in organic redox systems with multiple electrophores, 28, 1... 

Short-lived organic radicals, electron spin resonance studies of, 5, 53 Small-ring hydrocarbons, gas-phase pyrolysis of, 4, 147 Solid state, tautomerism in the, 32, 129 Solid-state chemistry, topochemical phenomena in, 15, 63 Solids, organic, electrical conduction in, 16, 159 Solutions, reactions in, entropies of activation and mechanisms, 1, 1 Solvation and protonation in strong aqueous acids, 13, 83 Solvent effects, reaction coordinates, and reorganization energies on nucleophilic substitution reactions in aqueous solution, 38, 161 Solvent, protic and dipolar aprotic, rates of bimolecular substitution-reactions in,... 

Nishimoto S, Hatta H, Ueshima H, Kagiya T (1992) 1-(5 -Fluoro-6 -hydroxy-5, 6 -dihydrouracil-5 -yl)-5-fluorouracil,a novel N(1)-C(5) linked dimer that releases 5-fluorouracil by radiation activation under hypoxic conditions. J Med Chem 35 2711-2712 Norman ROC, Storey PM, West PR (1970) Electron spin resonance studies, part XXV. Reactions of the sulphate radical anion with organic compounds. J Chem Soc (B) 1087-1095 Novais HM, Steenken S (1986) ESR studies of electron and hydrogen adducts of thymine and uracil and their derivatives and of 4,6-dihydroxypyrimidines in aqueous solution. Comparison with data from solid state. The protonation at carbon of the electron adducts. J Am Chem Soc 108 1-6... 

Radicals, organic free, identification by electron spin resonance, 1, 284 Reaction mechanisms, use of volumes of activation for determining, 2, 93 Reaction mechanisms in solution, entropies of activation and, 1, 1... 

Electron paramagnetic resonance spectroscopy has proved a valuable tool in the study of AdoCbl-dependent enzymes. AdoCbl itself is EPR-silent, but upon homolysis to form Cbl(II), two spins are formed, one on the cobalt (which now has low-spin d configuration) and one on the organic radical. Typically, the two unpaired electrons remain close enough in the enzymeis active site that they interact with one another to give complex, but informative, EPR spectra. 

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