par Cypres, René ;Bettens, Bernard
Référence Tetrahedron, 30, 10, page (1253-1260)
Publication Publié, 1974
Article révisé par les pairs
Résumé : The thermal cracking of phenol and ortho and para-cresol at atmospheric pressure, between 665°C and 865°C has been studied with a contact time of 2·5 seconds. 14C- and 3H-labelled substrates have been used in mechanistic studies of these processes. Elimination of one carbon monoxide produced quasi-exclusively by loss of the carbon of the hydroxyl function of the phenols is the first step and leads to the formation of cyclopentadiene or of a C5H6 compound. A condensation of two phenol molecules with loss of water and hydrogen to form dibenzofuran occurs simultaneously. The formation mechanism of this last compound is different according to the cracking temperatures. © 1974.