论文部分内容阅读
羟醛缩合反应类题目以信息题的形式出现,已成为近年来高考化学热点之一,为此本文对羟醛缩合反应进行解读。一、羟醛缩合反应在稀碱的催化条件下,醛(酮)分子的羰基结构使α碳原子上的氢原子具有较大的活性而发生加成反应。其中一个醛(酮)分子的α-氢加到另一个醛(酮)分子的打开双键的羰基的氧原子上,而剩余部分则加到打开双键的羰基的碳原子上,从而生成β-羟基醛(酮),这个过程就叫做羟醛(醇醛)缩合
The topic of aldol condensation reaction appears in the form of information question, which has become one of the hot spots in the college entrance examination in recent years. For this reason, the aldol condensation reaction is interpreted. First, the aldol condensation reaction In dilute alkali under the catalytic conditions, aldehyde (ketone) carbonyl structure so that the hydrogen atoms on the α carbon has greater activity and the addition reaction occurs. The alpha-hydrogen of one of the aldehyde (keto) molecules is added to the oxygen atom of the carbonyl of the open double bond of the other aldehyde (keto) molecule and the remainder is added to the carbon atom of the carbonyl that opens the double bond to produce beta - Hydroxy aldehyde (ketone), this process is called aldol (aldol condensation)