脂肪醛与Cu~(2+)络离子间的反应辨析

本文认为在相同的实验条件下,除甲醛外,其它脂肪醛都不能将费林试剂或本尼地试剂中的二价铜的络离子,还原为红色的氧化亚铜沉淀,而使试剂溶液的蓝色消失。即不能产生典型的阳性反应。所以,不应在有机化学教材中,把费林试剂和本尼地试剂与托伦试剂一起。

Distinguish ancl Analyze the Reaetion Between Lipidal and Complex Ion Cn2+

It is considered that at the same conditions of experiment, except formaldehyde, any lipidal couldn'f nlake complex ion Cu2+reduce into red suboxidc of copper sediment by Fehline reagent or Benedict reagent and blue Vanish from the soluticn of reagent, namely, it can'f yield typically positive reaction. Thevefore, in the textbook of organic chemistry it is forbidden to mix Fehline reagenfor Bcnecliet veagent with Tollcns reagent to distin guish aldehydo-ketone or lipidal and aromatic aldehyde.