Hydryl

Part of speech: noun

Definitions

1. A functional group in organic chemistry composed of a sulfur atom bonded to a hydrogen atom, often represented as –SH; plays a significant role in the structure and function of biomolecules
2. A chemical moiety consisting of a sulfur-hydrogen bond commonly found in thiols, important for forming disulfide bridges in proteins; notable for its reactivity in biological and chemical systems
3. A group characterized by the presence of sulfur linked to hydrogen, typically involved in molecular interactions and chemical reactions within biological contexts; integral to the properties of many sulfur-containing compounds

Etymology: Hydrogen takes its name from Greek "hydor," meaning water, and "-genes," meaning producing, because burning it yields water. Chemists formed "hydryl" by joining that root to the suffix "-yl." The suffix "-yl" comes from Greek "hyle," meaning wood or raw material. Justus von Liebig and Friedrich Wöhler used it when they named benzoyl, a group of atoms that stayed together through a series of reactions, from "benz(oin)" plus "-yl." The suffix then became a general label for groups that behave as single units within a larger molecule. In biochemistry, the sulfur-hydrogen group is more often called sulfhydryl, combining "sulfur" with "hydryl." That is why the group is so important in protein chemistry, where two such groups can link to form disulfide bridges.

Synonyms: thiol group