The Effect of Chloromethanes on Hydrogen Formation in the Radiolysis of Methylcyclohexane and 3-Methylpentane at −196°C

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概要

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• The effect of chloromethanes (CH<SUB>2</SUB>Cl<SUB>2</SUB>, CHCl<SUB>3</SUB> and CCl<SUB>4</SUB>) on hydrogen formation from γ-irradiated methylcyclohexane (MCH) and 3-methylpentane (3MP) at −196°C was investigated. It was found that the decrease in hydrogen yield by the presence of CH<SUB>2</SUB>Cl<SUB>2</SUB> was almost the same as that caused by an electron scavenger such as N<SUB>2</SUB>O, <I>n</I>-butyl chloride, SF<SUB>6</SUB> or iodobenzene, but the hydrogen yield was much lower in the presence of CHCl<SUB>3</SUB> or CCl<SUB>4</SUB> than other electron scavengers. Although the yield of CCl<SUB>3</SUB>. radicals formed from dissociative electron attachment to CCl<SUB>4</SUB> in CCl<SUB>4</SUB>-MCH systems was ∼1.4<I>G</I>, the decrease in hydrogen yield was ∼3<I>G</I>. A similar result was obtained for CHCl<SUB>3</SUB>-MCH systems. Thus we have ascribed the effect of CH<SUB>2</SUB>Cl<SUB>2</SUB> on hydrogen formation to electron scavenging and that of CHCl<SUB>2</SUB> or CCl<SUB>4</SUB> to excitation transfer as well as electron scavenging. ESR studies on radical formation from these systems also support the above interpretation.

• 公益社団法人 日本化学会の論文

著者

• Kimura Toyoaki

  Department Of Nuclear Engineering Faculty Of Engineering Osaka University:(present Address)division

• Fueki Kenji

  Department of Chemistry Faculty of Science Osaka University

• Kuri Zen-ichiro

  Department of Synthetic Chemistry, Faculty of Engineering, Nagoya University

• Wakayama Terunobu

  Department of Synthetic Chemistry, Faculty of Engineering, Nagoya University

• Fukaya Mitsuharu

  Department of Synthetic Chemistry, Faculty of Engineering, Nagoya University

• Hada Minoru

  Department of Synthetic Chemistry, Faculty of Engineering, Nagoya University

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