组成有机化合物的结构单元即称为基团的原子组合数目约有几十种，根据红外光谱特征吸收峰可以推断物质的结构，在此对各类有机化合物的光谱特征加以总结-Structural unit composed of organic compounds is known as the number of groups about dozens of atoms, according to IR absorption peaks can be deduced