Term: Schiff bases (Schiff's bases) https://doi.org/10.1351/goldbook.S05498 Definition: imines bearing a hydrocarbyl group on the nitrogen atom R2C=NR' (R' ≠ H). Considered by many to be synonymous with azomethines. Related Terms: 1) imines (http://doi.org/10.1351/goldbook.I02957). 2) hydrocarbyl (http://doi.org/10.1351/goldbook.H02891). 3) azomethines (http://doi.org/10.1351/goldbook.A00564). Source: PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1364 (https://doi.org/10.1351/pac199567081307) Citation: 'Schiff bases (Schiff's bases)' 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.S05498 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.