small molecule

https://doi.org/10.1351/goldbook.12276
Molecule much smaller than the wavelength of the radiation in the solvent used.
Note: For a molecule to be considered to be small, the lengths of all of its dimensions must be less than about one-twentieth of the wavelength employed.
Source:
PAC, 2015, 87, 71. (Definitions of terms relating to individual macromolecules, macromolecular assemblies, polymer solutions, and amorphous bulk polymers (IUPAC Recommendations 2014)) on page 107 [Terms] [Paper]
Citation: 'small molecule' 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.12276 RIS BibTex EndNote
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