Term: bond https://doi.org/10.1351/goldbook.B00697 Definition: There is a chemical bond between two atoms or groups of atoms in the case that the forces acting between them are such as to lead to the formation of an aggregate with sufficient stability to make it convenient for the chemist to consider it as an independent 'molecular species'. Related Terms: 1) agostic (http://doi.org/10.1351/goldbook.A00187). 2) coordination (http://doi.org/10.1351/goldbook.C01329). 3) hydrogen bond (http://doi.org/10.1351/goldbook.H02899). 4) multi-centre bond (http://doi.org/10.1351/goldbook.M04042). 5) chemical bond (http://doi.org/10.1351/goldbook.CT07009). Source: PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1089 (https://doi.org/10.1351/pac199466051077) Citation: 'bond' 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.B00697 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.