| —取代联苯系电取代反应定位规则共振论观 |
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| 引用本文： | 朱蕴菁.—取代联苯系电取代反应定位规则共振论观[J].达县师范高等专科学校学报,1997(2). |
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| 作者姓名： | 朱蕴菁 |
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| 作者单位： | 本校化学系副教授 |
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| 摘 要： | —取代联苯发生亲电取代反应时,当取代基为产生-I-C效应的吸电基或供电基在联苯环上4-位或2-位时,第二个取代基主要进入,未有取代基的苯环的邻位和对位,以对位为主.若取代基为产生-I>+C效应的吸电基或供电基在联苯环上3-位时,第二个取代基主要进入有取代基的苯环的邻位和对位,以对位为主.
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| 关 键 词： | —取代联苯 供电基 吸电基 亲电芳香取代 共振杂化体 |
Viewpoint of Resonance Theory of Orientation Rules in Electrophilic Substitution Reactions of Monosubstituted Biphenyls. |
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| Zhu,Yunqing.Viewpoint of Resonance Theory of Orientation Rules in Electrophilic Substitution Reactions of Monosubstituted Biphenyls.[J].Journal of Daxian Teachers College,1997(2). |
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| Authors: | Zhu Yunqing |
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| Abstract: | Monosubstituted biphenyl undergoes eletrophyilic aromatic substitution reactions. Whether the first substituent is an electron-withdrawing group which has -I-C effects or an electron donating group in the 4-or-2-positions of biphenyl introduction of a second substituent occurs primarily in the unsubstituted ring in the P- and O-positions, and the main product is p-position, Whether the first substituent is an electrow-withdrawing group which has-I>+C effects or an electron-donating group in the 3-position of biphenyl, introduction of a second substituent occurs primarily in the substituted ring in the p-and-O-positions, and the main product is P-position. |
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| Keywords: | monosubstited biphenyl electrondonating group electron-withdrawing group electrophilic aromatic substitution resonance hybrid |
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