Effects of quinones on the protonation reaction of TCNQ anion radical; The role of a protonated quinone as a strong electron acceptor.
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概要
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Various kinds of substituted <I>p</I>-benzoquinones (Q) have been found to accelerate the rate of the reaction between 7,7,8,8-tetracyanoquinodimethane(TCNQ) anion radical and hydrogen chloride in acetonitrile. The stoichiometry of the reaction is altered by the presence of Q from 2TCNQ<SUP>\newdot</SUP>+2H<SUP>+</SUP>=TCNQ+H<SUB>2</SUB>TCNQ to 2TCNQ<SUP>\newdot</SUP>+2H<SUP>+</SUP>+Q=2TCNQ+QH<SUB>2</SUB>. In case of <I>p</I>-benzoquinone, the rate of the disappearance of TCNQ<SUP>\newdot</SUP> is expressed by <I>v</I>=<I>k</I>[TCNQ<SUP>\newdot</SUP>] [Q] [H<SUP>+</SUP>], where <I>k</I>=3.0×10<SUP>8</SUP> M<SUP>−2</SUP> s<SUP>−1</SUP> at 8 °C. From these results, it is concluded that a protonated quinone QH<SUP>+</SUP> is an active species which accepts an electron from TCNQ<SUP>\newdot</SUP>.
- 公益社団法人 日本化学会の論文
著者
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Yamada Mutsuo
Department Of Surgery Hoshi General Hospital
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Yamagishi Akihiko
Department Of Chemistry College Of Arts And Sciences The University Of Tokyo
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