An alkyl group is a type of hydrocarbon group derived from an alkane by removing one hydrogen atom. It consists of carbon and hydrogen atoms arranged in a chain or branched structure. Common examples of alkyl groups include methyl (–CH₃), ethyl (–C₂H₅), and propyl (–C₃H₇). These groups are often used in organic chemistry to modify the properties of molecules. Alkyl groups play a significant role in the formation of various organic compounds, including alcohols, ethers, and alkyl halides. They can influence the physical and chemical properties of the compounds they are part of, such as boiling points and solubility. Understanding alkyl groups is essential for studying organic reactions and synthesis.