Stable radicals are molecules that contain unpaired electrons, which typically make them highly reactive. However, certain radicals can be stabilized through resonance or by being part of a larger molecular structure. This stability allows them to exist longer than typical radicals, making them useful in various chemical reactions. These stable radicals play a significant role in fields like organic chemistry and materials science. For example, they can be used in the development of polymers and medicinal compounds. Their unique properties enable researchers to explore new pathways for synthesis and improve the performance of materials.