group 

https://doi.org/10.1351/goldbook.G02705
A defined linked @C01148@ of atoms or a single atom within a @M03986@. This use of the term in physical organic and general chemistry is less restrictive than the definition adopted for the purpose of nomenclature of organic compounds.
See also: characteristic group (in organic nomenclature), principal group (in inorganic nomenclature) (in organic nomenclature), substituent (in organic nomenclature)
Source:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1118 [Terms] [Paper]
See also:
Blue Book, p. 82 [Terms] [Book]
Citation: 'group' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.G02705 RIS BibTex EndNote
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Last revised: February 24, 2014