Abnormal Benzo Substituent Effect on Free Radical Formation Process. A Local Symmetry Effect
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概要
- 論文の詳細を見る
Relative stabilities of 1-bicyclo[2.2.2]octyl (<B>9</B>), 1-benzobicyclo[2.2.2]-octenyl (<B>10</B>), 1-dibenzobicyclo[2.2.2]octadienyl (<B>11</B>), and 1-tribenzobicyclo[2.2.2]octatrienyl(<B>12</B>) radicals were obtained by means of the relative rates of the free radical bromine abstraction from the corresponding bridgehead bromides by a silyl radical. It was found that <B>9</B> and <B>12</B> were more stable than expected. The observed order of stability <B>9</B>><B>10</B>><B>12</B>><B>11</B> can not be explained by the usual concepts alone. The extra stabilization of <B>9</B> or <B>12</B> (or destabilization of <B>10</B> or <B>11</B>) was interpreted in terms of the local symmetry (or local asymmetry) of these radicals.
- 公益社団法人 日本化学会の論文
著者
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Yoshida Zen-ichi
Department Of Applied Chemistry Faculty Of Science And Engineering Kinki University
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Aoyama Yasuhiro
Department Of Chemistry Nagaoka University Of Technology
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Tabushi Iwao
Department of Pharmaceutical Sciences, Kyushu University
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Tabushi Iwao
Department oe Pharmaceutical Sciences, Kyashu University
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