Pentamethylnitrosobenzene as a spin-trapping agent.
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概要
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Pentamethylnitrosobenzene synthesized readily from pentamethylbenzene was studied for utilization in a spin-trapping technique. In a benzene solution it forms a dimer with a dissociation constant of 10<SUP>5.26</SUP>exp(−50⁄<I>RT</I>) in units of kJ/mol. It traps the <I>t</I>-butyl radical with the trapping rate constant of 1.4×10<SUP>8</SUP> mol<SUP>−1</SUP> dm<SUP>3</SUP> s<SUP>−1</SUP> at 299 K. It is thus an efficient spin-trapping agent, even though only a fraction of it is reactive with the short-lived free radicals because the equilibrium lies more on the side of the dimeric form. Electron spin resonance parameters were determined for the spin-adduct radicals derived from alkyl, alkoxyl, and phenyl radicals with this trapping agent. These free radicals were found to attach exclusively to the nitrogen atom of the nitroso compound.
- 公益社団法人 日本化学会の論文
著者
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Yoshida Hiroshi
Faculty Of Math Kyushu Univ.
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Ichikawa Tsuneki
Faculty of Engineering, Hokkaido University
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Doba Takahisa
Faculty of Engineering, Hokkaido University
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