04548 IUPAC Gold Book - phosphanes 10.1351/goldbook.P04548 P04548 current 1 The saturated hydrides of tervalent phosphorus having the general formula $\ce{P_{n}H_{n+2}}$. Individual members having an unbranched phosphorus chain are named phosphane, diphosphane, triphosphane, etc. The name of a saturated hydride of phosphorus wherein one or more phosphorus atoms have a bonding number of 5 is formed by prefixing locants and \(\lambda ^{5}\) symbols to the name of the corresponding phosphane. Hydrocarbyl derivatives of $\ce{PH3}$ belong to the class phosphines. bonding number https://goldbook.iupac.org//terms/view/B00703 hydride https://goldbook.iupac.org//terms/view/H02904 phosphines https://goldbook.iupac.org//terms/view/P04553 PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1357 (https://doi.org/10.1351/pac199567081307) https://goldbook.iupac.org/terms/view/P04548/html https://goldbook.iupac.org/terms/view/P04548/json https://goldbook.iupac.org/terms/view/P04548/plain Citation: 'phosphanes' 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.P04548 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. 2026-05-06T17:31:19+00:00