Term: solvatomers https://doi.org/10.1351/goldbook.08209 Definition: Isomers that differ in their solvation environment. Notes: 1) Because the solvation environment fluctuates rapidly, solvatomers interconvert rapidly. 2) Species that differ in the type of solvent molecules should not be called solvatomers because they are not isomers. Source: PAC, 2022, 94, 353. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 2021)' on page 505 (https://doi.org/10.1515/pac-2018-1010) Citation: 'solvatomers' 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.08209 License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.