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在讲乙烯的加成反应时,学生观察了乙烯和溴水的反应之后,写出了四个可能的方程式,经过生生之间的讨论,最终剩下了以下两种可能:①C_2H_4+Br_2→C_2H_2Br+HBr②C_2H_4+Br_2→C_2H_4Br_2科研中检验新的有机物是C_2H_3Br还是C_2H_4Br_2可以借助红外光谱、质谱、核磁共振等方法,但这些方法需要昂贵的设备,不宜在中学实验室开展。大家可否设计简易的实验验证一下到底哪个正确呢?学生之间通过讨论,甲同学回答道:“从反应类型看,①是取代反应,生成溴乙烷和溴化氢;②类似于无机化学中的化合反应。可以从分析产物HBr着手,
After talking about the ethylene addition reaction, students observed the reaction of ethylene and bromine water and wrote four possible equations. After the discussion between the living and the living, the following two possibilities are finally left: ①C_2H_4 + Br_2 → C_2H_2Br + HBr②C_2H_4 + Br_2 → C_2H_4Br_2 In the research, whether the new organic matter is C_2H_3Br or C_2H_4Br_2 can be determined by means of infrared spectroscopy, mass spectrometry and nuclear magnetic resonance. However, these methods require expensive equipment and should not be carried out in middle school laboratories. We can design a simple experimental verification in the end what exactly? Through discussion between students, A classmates replied: ”From the reaction type, ① is replaced by the reaction, the formation of bromoethane and hydrogen bromide; ② similar to Inorganic Chemistry In the compound reaction can proceed from the analysis of the product HBr,