Kinetics and mechanism of the product conversions in reaction of 2,4,6-tri-t-butylphenol with NO2

Kinetics of the thermal decay and with NO2 interaction of o-quinolide hydroperoxides (o-QHP) has been studied in hexadecane. The formation of o-QHP was initiated by the bubbling of NO2 and air mixture through the 2,4,6-tri-t-butylphenol solution in a batch reactor. The rate constant of the o-QHP thermal decay with the o-quinone formation is k(d) = 10(15) x exp(-114+/-4kJ/RT)s(-1). The kinetics of the o-QHP consumption at 295 K in reaction with NO2 is described by the second order equation relative to hydroperoxide. The mechanism of this process is discussed, The effective values of the activation energy and preexponent of the thermal decomposition of 2,4,6-tri-t-butylnitrocyclohexadienone are 60 kJ/mol and 3.5 x 10(6) s(-1), respectively.