Organic reactions are chemical processes that involve organic compounds, which are primarily made up of carbon atoms. These reactions can lead to the formation of new substances by breaking and forming chemical bonds. Common types of organic reactions include substitution, addition, and elimination reactions, each with its own unique mechanisms and outcomes. In organic chemistry, understanding these reactions is crucial for creating various products, from pharmaceuticals to plastics. For example, the synthesis of aspirin involves an organic reaction where salicylic acid reacts with acetic anhydride. By studying these reactions, chemists can design and optimize processes to develop new materials and medicines.