乙基香草醛( )是食品添加剂的增香原料,其香味比香草醛更加浓郁.(1)关于乙基香草醛的下列说法中不

2025-03-16 23:49:55
推荐回答(1个)
回答1:

(1)A.乙基香草醛分子中含有醛基-CHO,可以发生银镜反应,故A正确;
B.乙基香草醛分子中含有酚羟基-OH,酸性比碳酸弱,不可以与NaHCO 3 溶液反应放出CO 2 气体,故B错误;
C.1mol乙基香草含有1mol苯环、1mol-CHO,1mol苯环与3mol氢气发生加成反应,1mol-CHO与1mol氢气发生加成反应,故1mol乙基香草最多能和4molH 2 发生加成反应,故C错误;
D.乙基香草醛的分子式为C 9 H 10 O 3 ,故1mol该化合物完全燃烧需消耗O 2 为(9+
10
4
-
3
2
)mol=1mol,故D正确;
故选BC;
(2)①A被氧化后生成的B能发生银镜反应,则说明B含有醛基,A含有醇羟基,且醇羟基连接的碳原子上含有2个氢原子,即A中存在伯醇结构,能发生取代反应生成C,A能被酸性高锰酸钾溶液氧化生成苯甲酸,一定条件下可以生成高分子化合物D,所以A是





,故答案为:












在浓H 2 SO 4 存在下加热,生成八元环状化合物的方程式为:




故答案为:





(3)



合成



,可以先将



氧化为







再与甲醇发生酯化反应生成



,故答案为:氧化反应;酯化反应;
(4)乙基香草醛还有多种同分异构体,满足:Ⅰ.能发生水解反应,说明含有酯基,Ⅱ.苯环上只有2个取代基;Ⅲ.1mol 该化合物和过量NaOH溶液共热反应时能消耗3molNaOH,应含有1个酚羟基,含有丙酸与苯酚形成的酯的结构,即-OOCCH 2 CH 3 ,两个基团有邻、间、对三种结构,符合上述三个条件的同分异构体的结构简式













故答案为:











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