Organic chemistry is still very easy to learn, because the classification of organic matter is very clear, and the structure and chemical properties of the same kind of organic matter are similar, and the physical properties have a linear relationship. Therefore, as long as we understand the structure of this kind of organic matter and its influence on chemical and physical properties, we can understand their properties well, such as alcohol, whose functional group is hydroxyl, so we should study the properties of hydroxyl and its influence on the properties of organic matter. Generally speaking, the method is as follows:

1. It is necessary to summarize the chemical equations and conditions corresponding to some common reaction types.

2. Be sure to understand the mechanism of nucleophilic addition and electrophilic addition, and the mechanism of free radical substitution. This is often needed.

3. Pay attention to when it is anti-horse addition and when Markov rule is used. Cis-trans isomerism is not necessarily related to Z, E isomerism.