## Abstract Cyano‐substituted methyl radicals (cyanomethyl–hand 2‐cyano‐2‐propyl radicals) and __syn__‐and __anti__‐1‐cyano‐allyl radicals were generated, and their recombination kinetics in solution were investigated between −50 and +50°C by time‐resolved electron‐spin‐resonance spectroscopy. The
The kinetics of the bimolecular self-reaction of t-butyl radicals in solution. II. Disproportionation/combination ratios
✍ Scribed by Hans-Herbert Schuh; Hanns Fischer
- Publisher
- John Wiley and Sons
- Year
- 1978
- Tongue
- German
- Weight
- 952 KB
- Volume
- 61
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
Disproportionation/combination ratios P~d~/P~c~ of self‐reacting t‐butyl radicals are determined as a function of solvent and temperature. the observed large solvent and temperature dependences are ascribed to anisotropic reorientational motions of the radicals during their encounter in the solvent cage. Results for other alkyl radicals are compatible with this concept.
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## Abstract A competitive method involving the direct measurement of radical concentrations by EPR spectroscopy has been used to show that in solution at 25°C the rate constants for the bimolecular self‐reactions of ethyl, isopropyl, __tert__‐butyl, cyclopentyl, and trichloromethyl are all approxim
By photolyzing azomethane over the temperature range 331-491 K in the presence of trifluoroacetone the kinetics of the addition reaction (11, CH3 + CF3COCH3 + CF,C(O)(CH, )z have been studied. Detailed analyses have shown that the principal product of the adduct radical, CF3C(0)(CH3)2, is CH,COCH, f
## Abstract The kinetics of the gamma‐radiation induced free‐radical chain reaction in solutions of carbon tetrachloride in __n__‐hexane (RH) was investigated in the temperature range of 297.5–373°K. Trichloromethyl radicals were produced by the reaction of radiolytically generated hexyl radicals w
The kinetics of the photoinitiated reductions of methyl iodide and carbon tetrachloride by tri-n-butylgermanium hydride in cyclohexane at 25°C have been studied and absolute rate constants have been measured. Rate constants for the combination of CH,. and CC1,. radicals are equal within experimental