羰基（carbonyl group）是由碳和氧两种原子通过双键连接而成的有机官能团（C=O）。是醛、酮、羧酸、羧酸衍生物等官能团的组成部分。
misc. carbanyl group
The attack of the hydroxyl free radical induces changes of the bonding of carbonyl group and other vicinal bonds. It is also revealed that there are fairly strong interactions among the atomic orbitals of the three phenyl of fenvalerate.
羟基自由基的进攻也引起了羰基及其附近化学键的变化。
参考来源 - 拟除虫菊酯类农药降解机理的理论研究·2,447,543篇论文数据，部分数据来源于NoteExpress
通过4-甲氧基苯甲醛的羰基加成反应合成4-甲氧基-苯基羟基乙酸。
The 4-methoxy-phenylhydroxy-acetic acid was synthesized by the carbonyl addition reaction of 4-methoxybenzaldehyde.
烷基自由基对羰基进行进攻，生成双环的羰自由基中间体。
This radical attacks the carbonyl group to an intermediate bicyclic ketyl.
羰基在一般条件下不易被化学还原剂还原。
The chemical reductants fail to reduce carbonyl group under ambient conditions.
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