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很短两句话，6金币【汉译英】
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机器翻译不给金币，金币只给翻译最好的一个， 摘要：Wittig反应是构筑碳碳双键的一个重要方法, 在合成中得到了大量应用。而Wittig 反应后处理却浪费大量原料和时间，本论文主要对Wittig反应后处理做了改进，大大降低了成本和操作时间，具有一定的经济意义。 关键词：Wittig反应，重结晶，合成，改进，三苯基氧磷 |
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lixiaod001(金币+2,VIP+0): 11-27 14:38
lixiaod001(金币+2,VIP+0): 11-27 14:38
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Abstract: The Witting reaction is one of the important methods for constructing the C-C double bonds that is extensively used in synthesis. However, the follow-up treatment of the Witting reaction wastes lots of raw materials and consumes much time. The present work mainly targets on the modification of the follow-up treatment of the Witting reaction, which greatly reduces the costs and operatiing time thus gains economical merits to some degree. |
2楼2009-11-26 15:57:12
syh9288
捐助贵宾 (著名写手)
海军上将
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lixiaod001(金币+2,VIP+0): 11-27 14:39
lixiaod001(金币+2,VIP+0): 11-27 14:39
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Abstract:Wittig reaction is a important way to attain carbon-carbon double-bond,which is usually applied in synthesis.But the following treatment for products got through Wittig reaction will cost us losts of raw materials and much time.This paper focus on the improvement for the following treatment of Wittig reaction.After this measure having some economic significance,the cost and operating time can be greatly reduced. Keywords: Wittig reaction,recrystallization, synthesis, improvement, Triphenylphosphine |
3楼2009-11-26 19:17:24
cam967
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lixiaod001(金币+2,VIP+0): 11-27 14:39
lixiaod001(金币+2,VIP+0): 11-27 14:39
| Witting Reaction, an important method to form double C-C bond, has gained extensive applications in synthesis. However, the aftertreatment of this reaction brings much waste of both raw materials and operation time.To overcome this disadvantage, aftertreatment of Witting Reacton has been modified in this paper, resulting in the dramatically reduce of cost and operation time. |
4楼2009-11-26 21:53:55