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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
Author(s) -
XueGong Lei,
QingXiang Guo,
YouCheng Liu
Publication year - 1986
Publication title -
acta chimica sinica english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 0256-7660
DOI - 10.1002/cjoc.19860040203
Subject(s) - chemistry , peroxide , decomposition , cidnp , thermal decomposition , kinetics , photochemistry , chemical decomposition , reaction rate constant , hydrogen peroxide , organic chemistry , polymer chemistry , radical , physics , quantum mechanics
The 1 H 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 T 1 of the α‐protons in 1‐iodoundecane and vinyl protons of CH 2 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.