Term: chiral feature https://doi.org/10.1351/goldbook.08155 Definition: Structural characteristic rendering a molecule chiral. Example: Four different substituents on a carbon atom (chirality center), conformational helix, and chiral axis (as in allenes <span title="substance">\(\ce{XCH=C=CHX}\)</span>). Example: Array Source: PAC, 2022, 94, 353. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 2021)' on page 386 (https://doi.org/10.1515/pac-2018-1010) Citation: 'chiral feature' 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.08155 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.