Studies on the kinetics of decomposition of diacyl peroxides: VI. CIDNP in the products of thermolysis of lauroyl peroxide and 3,5,5-trimethylhexanoyl peroxide

The ¹H NMR spectra recorded during the thermolysis of lauroyl peroxide and of 3,5,5-trimethylhexanoyl peroxide in ODCB containing 2-iodopropane show CIDNP multiplet effect. It was observed that the relative concentrations of 1-iodoundecane and 2-iodopropane, both polarized and normal species, changed with time. The relaxation time T₁ of the α-protons in 1-iodoundecane and vinyl protons of CH₂ in 1-undecene, enhancement factor of the protons of polarized species and the rate constant of decomposition for lauroyl peroxide have been determined. The mechanism of the decomposition of the entitled peroxides is discussed in terms of the radical pair theory.