Title: ion/neutral species reaction
Long Title: IUPAC Gold Book - ion/neutral species reaction
DOI: 10.1351/goldbook.I03226
Status: current

Definition
A process wherein a charged species interacts with a neutral reactant to produce either chemically different species or changes in the internal energy of one or both of the reactants. The contrasting expression ion/neutral reaction is not ideal, simply because the word neutral is not a noun. However, any alternatives such as ion/neutral species reaction are so clumsy as to mitigate against their general acceptance

Related Term
- internal energy: https://goldbook.iupac.org//terms/view/I03103

Source
- PAC, 1991, 63, 1541. 'Recommendations for nomenclature and symbolism for mass spectroscopy (including an appendix of terms used in vacuum technology). (Recommendations 1991)' on page 1556 (https://doi.org/10.1351/pac199163101541)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/I03226/html
- json: https://goldbook.iupac.org/terms/view/I03226/json
- xml: https://goldbook.iupac.org/terms/view/I03226/xml

Citation: Citation: 'ion/neutral species reaction' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.I03226
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Accessed: 2026-07-26T17:35:35+00:00