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sxzzg

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如Table1 所示带有给电子基团的酸可以再较短的时间内完成反应,带有较弱吸电子基的酸在适当延长反应时间的条件下完成反应,但当酸带有强吸电子基(如硝基)时不论延长反应时间还是提高反应温度均不发生反应
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sadmissyou

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爱与雨下(金币+1): 2011-11-08 12:05:17
sxzzg(金币+4, 翻译EPI+1): 2011-11-10 18:59:03
table.1 demonstrates that: the reaction could be completed in a short period when the acids contain electron-donating group; for the acids containing weak electron-attracting group, it requires the proper extention of reaction time;  when the acids contain strong electron-attracting group on the other hand, the reaction will not take place even with extending the reaction time or increasing the temprature.
2楼2011-11-08 11:58:33
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fjtony163

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米米

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爱与雨下(金币+1): 2011-11-08 12:05:23
sxzzg(金币+6): 2011-11-10 18:59:07
As Table 1 mentioned, acid with electron donating group can complete reaction in shorter time and acid with weaker electron drawing group can complete reaction in longer reaction time. However, the acid with strong electron drawing group (e.g. nitro-) cannot react neither when extending reaction time nor raising reaction temperature.
3楼2011-11-08 12:01:27
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