2606-99-7Relevant articles and documents
Negative activation energies and compensation effects for the reactions of diarylanimyl radicals with phenols
Varlamov, V. T.,Denisov, N. N.,Nadtochenko, V. A.
, p. 2282 - 2286 (1995)
The temperature dependence of the rate constants of the reaction of 4,4'-disubstituted diphenylaminyl radicals (ArAr'N.) with phenols has been studied by a laser pulse photolysis technique.The linear relationships between activation energies E1 (negative in the majority of cases) and logarithms of pre-exponential factors logA1 have been established.These results coincide with the two-parametric correlations of logk1 with ?+ constants of substituents in phenol and aminyl radicals under isothermal conditions.The reaction rate constants decrease considerably when toluene is used instead of n-decane. - Key words: aminyl radicals, phenols, negative temperature coefficient, isoparametric correlations.