glyceryl
Noun: A univalent radical, C₃H₅, derived from glycerol. It is the fundamental hydrocarbon group that forms the backbone of triglycerides (fats and oils) and other glycerol esters.
The term "glyceryl" is used almost exclusively in scientific and biochemical contexts to refer to the three-carbon radical that remains when the hydroxyl (-OH) groups of glycerol are involved in chemical bonds, typically ester linkages. * In biochemistry, fats are described as glyceryl esters of fatty acids. * The structural formula of a triglyceride shows three fatty acid chains attached to the glyceryl backbone.
- A triglyceride molecule consists of a glyceryl radical bonded to three fatty acid molecules.
- The chemical synthesis involved replacing the hydrogen on the glyceryl group.
- Phospholipids contain a glyceryl backbone with two fatty acids and a phosphate group.
- Glyceryl radical: This specific term emphasizes the radical's role as a reactive fragment in chemical reactions.
- Glyceryl moiety: Used in more formal chemical descriptions to denote the glyceryl part within a larger molecule.
- Glycerol (noun): The parent compound, a trihydric alcohol (C₃H₅(OH)₃), from which the glyceryl radical is derived.
- Glyceride (noun): An ester formed from glycerol and fatty acids; includes monoglycerides, diglycerides, and triglycerides.
- Triglyceride (noun): A lipid molecule where all three hydroxyl groups of glycerol are esterified with fatty acids.
- Propanetriyl radical (technical/IUPAC name): A systematic chemical name for the same trivalent group.
- Glycerin radical (less common): An older or alternative name.
The provided reference context describes it as a "trivalent radical." In modern chemical nomenclature, the glyceryl group (C₃H₅-) is formally considered a univalent radical when named as a substituent (e.g., in "glyceryl trinitrate"). However, in the context of its core structure within esters like triglycerides, it is functionally trivalent, as it provides three attachment points. This dual perspective explains the slight variation in definitions.
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a trivalent radical derived from glycerol by removing the three hydroxyl radicals
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