茶多酚是目前尚不能人工合成的纯天然、多功能、高效能的抗氧化剂

茶多酚是目前尚不能人工合成的纯天然、多功能、高效能的抗氧化剂和自由基净化剂。其中没食子儿茶素(EGC)的结构如图所示。关于EGC的下列叙述中正确的是(  )

A.分子中所有的原子共面

B1 mol EGC4 mol NaOH恰好完全反应

C.易发生氧化反应和取代反应,能发生加成反应

D.遇FeCl3溶液发生显色反应

答案

解析:分子中存在饱和碳原子,这种碳原子与其相连的4个原子不能共平面(四面体结构)1 mol EGC3 mol NaOH恰好完全反应;由于分子中存在醇、酚羟基,因此EGC易发生氧化和取代反应,苯环在一定条件下能发生加成反应。由于分子中存在酚羟基,与Fe3+发生显色反应,故选项CD的描述正确。

答案:CD

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