What is one of the main roles of functional groups in organic compounds?

Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. They largely dictate how a compound will behave in a chemical reaction, influencing its reactivity and interaction with other substances. This aspect is crucial in organic chemistry because it allows chemists to predict the types of reactions that an organic compound containing a particular functional group may undergo, enabling the design of reactions for synthesis or material development.

The presence of a specific functional group can also determine properties such as polarity, acidity, and solubility, which are closely tied to reactivity. For instance, alcohols, carboxylic acids, amines, and ethers each have distinct functional groups that lead to their unique chemical behaviors. Thus, the defining role of functional groups in determining the reactivity of organic compounds is a foundational concept in organic chemistry.