Intermediate compounds are substances formed during a chemical reaction that exist between the reactants and the final products. They often have distinct properties and can be unstable, meaning they may quickly convert into other compounds. These intermediates play a crucial role in understanding reaction mechanisms and pathways. In many cases, intermediate compounds can be detected and studied using various analytical techniques. For example, in organic chemistry, carbocations and free radicals are common types of intermediates. Their identification helps chemists predict the behavior of reactions and design new synthetic pathways for creating desired products.