Term: imino carbenes https://doi.org/10.1351/goldbook.I02960 Definition: This term systematically means carbenes bearing an imino or N-substituted imino group, RN=, somewhere in the molecule. E.g. R–C:–CH2C(=NR)R. It is listed here in order to warn against its misuse for alkylideneamino carbenes. Related Terms: 1) carbenes (http://doi.org/10.1351/goldbook.C00806). 2) nitrile ylides (http://doi.org/10.1351/goldbook.N04153). Source: PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1343 (https://doi.org/10.1351/pac199567081307) Citation: 'imino carbenes' 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.I02960 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.