Title of article :
The oxidation of 2-alkoxy-3,6-di-tert-butylphenols. The reversible dimerization of 2-alkoxy-3,6-di-tert-butylphenoxy radicals
Author/Authors :
Abakumov، نويسنده , , Gleb A. and Cherkasov، نويسنده , , Vladimir K. and Nevodchikov، نويسنده , , Vladimir I. and Druzhkov، نويسنده , , Nikolai O. and Fukin، نويسنده , , Georgii K. and Kursky، نويسنده , , Yurii A. and Piskunov، نويسنده , , Alexandr V.، نويسنده ,
Issue Information :
هفته نامه با شماره پیاپی سال 2005
Abstract :
The oxidation of 2-alkoxy-3,6-di-tert-butylphenols has been studied. It was found that 2-RO-3,6-di-tert-butylphenoxy radicals (R = Et, Pr, Ph) undergo dimerization by C–O coupling. The X-ray structure of 2-ethoxy-3,6-di-tert-butylphenoxy dimer has been determined. Radical dimers dissociate reversibly in solution to give two phenoxy radicals at 200–350 K. By using EPR spectroscopy the equilibrium concentration of the phenoxy radicals, equilibrium constants and ΔH and ΔS of dissociation have been determined.
Keywords :
Reversible dissociation , Phenoxy radical , Oxidation , phenol
Journal title :
Tetrahedron Letters
Journal title :
Tetrahedron Letters
