SCHEDULED MAINTENANCE
Electron spin resonance and kinetic studies on the liquid-phase decomposition of cumene hydroperoxide by lead dioxide
Abstract
The kinetics of liquid-phase decomposition of cumene hydroproxide by lead dioxide have been studied by e.s.r. The concentration of cumylperoxyl radical in the reaction solution was determined. The e.s.r. and kinetic results as well as the product distribution lead to the conclusion that hydroperoxide decomposition by lead dioxide is a radical chain reaction. The hydroperoxide forms a surface complex on lead dioxide and the complex dissociates to the peroxyl radical which desorbs into the homogeneous phase, where chain propagation and termination proceed. The formation of a complex between hydroperoxide and peroxyl radical is suggested. The rate constants for the elementary reactions have been determined.
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