Phenyl is a functional group in organic chemistry, consisting of a benzene ring minus one hydrogen atom. It is represented by the symbol C6H5 and is commonly found in various chemical compounds. The presence of the phenyl group can significantly influence the properties and reactivity of these compounds. Phenyl groups are often encountered in pharmaceuticals, dyes, and plastics. They contribute to the stability and aromatic characteristics of molecules. Compounds containing phenyl groups can exhibit unique behaviors, making them important in fields like medicinal chemistry and materials science.