EPR study of kinetics of reaction of o-thiobisphenols with dicyclohexylperoxydicarbonate
Journal Article
·
· Kinet. Catal. (Engl. Transl.); (United States)
OSTI ID:5845478
EPR spectra were obtained and rate constants were measured of disproportionation of phenoxyl radicals from di(2-hydroxy-3-tert-butyl-5-methylphenyl) monosulfide (I) and its ethyl-substituted analog (II). These constants are described by the expression log k/sub 9/ = 7.18 - (5050 +/- 750)/4.576T (I) and log k/sub 9/ = 9.10 - (7820 +/- 250)/4.576T (II). The reaction of (I) and (II) with peroxy compounds was studied on a model peroxide, dicyclohexyl peroxydicarbonate (CPC). The rate constants of the reactions with CPS are described by expressions log k = 5.83 - (11,400 +/- 800)/4.576T (I) and log k = 6.83 - (12,400 +/- 700)/4.576T (II). It was shown that in the reaction of (I) and (II) with CPS, radicals are effectively generated; their yield per molecule of reacted peroxide is approx. 10/sup -1/, and decreases with increase in temperature. The possible reasons for the unusual behavior of the system are discussed.
- Research Organization:
- Institute of Chemical Physics, Moscow, USSR
- OSTI ID:
- 5845478
- Journal Information:
- Kinet. Catal. (Engl. Transl.); (United States), Journal Name: Kinet. Catal. (Engl. Transl.); (United States) Vol. 27:4; ISSN KICAA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
640302 -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
AROMATICS
CARBON COMPOUNDS
CARBONATES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
DECOMPOSITION
ELECTRON SPIN RESONANCE
HYDROXY COMPOUNDS
HYPERFINE STRUCTURE
KINETICS
MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDATION
OXYGEN COMPOUNDS
PEROXIDES
PHENOLS
PHENOXY RADICALS
PYROLYSIS
RADICALS
REACTION KINETICS
REDOX POTENTIAL
REDUCTION
RESONANCE
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
YIELDS
400201* -- Chemical & Physicochemical Properties
640302 -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
AROMATICS
CARBON COMPOUNDS
CARBONATES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
DECOMPOSITION
ELECTRON SPIN RESONANCE
HYDROXY COMPOUNDS
HYPERFINE STRUCTURE
KINETICS
MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDATION
OXYGEN COMPOUNDS
PEROXIDES
PHENOLS
PHENOXY RADICALS
PYROLYSIS
RADICALS
REACTION KINETICS
REDOX POTENTIAL
REDUCTION
RESONANCE
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
YIELDS