关键词: 亚硝基化合物, 热分解法, 反应动力学, 苯, 四氯化碳, 游离基, 自由基反应, 电子自旋共振, 酰化合物, 过氧化物

C-Phenyl-N-tert-butylnitrone (PBN), nitrosobenzene (NB), and tert-nitrosobutane (TNB) have been used as spin-trapping agents for the trapping and detection of short-lived alkyl radicals formed during the decomposition of several diacyl peroxides RC(O)OOC(O)R (R = n-C11H23, n-C9H19, n-C8H17, n-C7H15, n-C5H11, Me2CH(CH2)3, Me2CHCH2, Me3CCH2, Me3CCH2CHMeCH2) in benzene or carbon tetrachloride. The ESR spectra of the nitroxide radicals produced by the addition of alkyl radicals to spin-trapping agents have been recorded. It is observed that the hydrogens of a-CH2 in 2,4,4-trimethylpentyl radical are diastereotopic and nonequivalent and, on account of this, the ESR spectrum produced from the adduct with this radical is different from that with the other radicals.

Key words: NITROSO COMPOUNDS, THERMAL DECOMPOSITION METHOD, REACTION KINETICS, BENZENE, CARBON TETRACHLORIDE, FREE RADICAL, FREE RADICAL REACTION, ELECTRON SPIN RESONANCE, ACYL COMPOUND, PEROXIDE