The experimental section explains what materials and equipment were used and what procedures were followed to perform an experiment. This can be an especially important section if you are interested in how to synthesize the same or similar compounds. It may also include safety information such as explosive tendencies of reagents used. Sometimes a general synthesis section precedes the descriptions of the syntheses of specific compounds and how they differ from the general procedure. It is important to read the experimental section thoroughly so as not to miss important details such as safety information and the general or specific procedure followed.