14218 IUPAC Gold Book - antidirectional packing 10.1351/goldbook.14218 14218 current synonym: antiparallel packing 1 In a parallel-chain crystal, the crystalline packing of directional stems with opposite chain axis orientations. Usually, stems of opposite orientations occur in equal numbers in parallel-chain crystals. directional stems https://goldbook.iupac.org//terms/view/14208 PAC, 2011, 83, 1831. 'Definitions of terms relating to crystalline polymers (IUPAC Recommendations 2011)' on page 1845 (https://doi.org/10.1351/PAC-REC-10-11-13) https://goldbook.iupac.org/terms/view/14218/html https://goldbook.iupac.org/terms/view/14218/json https://goldbook.iupac.org/terms/view/14218/plain Citation: 'antidirectional packing' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.14218 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. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . 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. 2026-06-07T03:20:31+00:00