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如何同时检验双键和醛基

更新时间: 2020-10-13 00:00:00     

如果首先检验双键,加入溴水和酸性高猛酸钾,溶液褪色则证明含有双键,但因含有醛基,醛基有还原性也能使这两种溶液褪色,所以应区分检验的先后顺序,应先检验醛基,用银氨溶液或新制氢氧化铜,又因为检验醛基后的溶液是碱性,所以应酸化后再加溴水或高猛酸钾检验碳碳双键。

具体方法为:

1、先取一份样品,加入银氨溶液,加热,如果有银镜反应,则证明含有醛基;

2、然后酸化后滴入溴水,振荡,褪色,则证明含有碳碳双键。

关键词: 如何 同时 检验

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