Association and photolysis of 1-benzyl-4-methoxycarbonylpyridinyls.
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概要
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1-Benzyl- and 1-(4-methylbenzyl)-4-methoxycarbonylpyridinyl radicals have been prepared by reducing the corresponding pyridinium iodides with sodium amalgam. Hyperfine structures of the ESR spectra were analyzed. The radicals were decomposed photochemically with visible light in the region 380–440 nm in order to generate the intermediate benzyl radicals which were identified spectroscopically at 77 K. Association of each radical at low temperature forms a diamagnetic radical dimer, which is transformed by irradiating the solution with 440–470 nm light into the triplet dimer with zero-field parameters, <I>D</I>=<I>ca.</I> 0.017 cm<SUP>−1</SUP> and E≈O. Another radical, 1-(4-nitrobenzyl)-4-methoxycarbonylpyridinyl, is unstable at room temperature.
- 公益社団法人 日本化学会の論文
著者
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Ikegami Yusaku
Chemical Research Institute Of Non-aqueous Solutions
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Kubota Shozo
Chemical Research Institute of Non-Aqueous Solutions, Tohoku University
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Watanabe Hidetoshi
Chemical Research Institute of Non-Aqueous Solutions, Tohoku University
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