electron-withdrawing的意思|示意
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吸电子
electron-withdrawing相关例句
Electron - withdrawing 2 - substituents electron - donating 3 - substituents of the phenyl ring are favorable for increased herbicidal activity.
苯环2位是拉 电子基,3位是给电子基有利于提高除草活性.
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Conclusions: The alkanes substituted phenolshigher antioxidant activity than that of electron - withdrawing groups substituted phenols.
结论: 烷烃基类取代物易于抗氧化,卤代烃基或硝基类取代物抗氧化活性差.
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