## Wikipedia - Organophosphorus compound phosphanes

https://doi.org/10.1351/goldbook.P04548
The saturated hydrides of tervalent phosphorus having the general formula PnHn+2 . Individual members having an unbranched phosphorus chain are named phosphane, diphosphane, triphosphane, etc. The name of a saturated @H02904@ of phosphorus wherein one or more phosphorus atoms have a @B00703@ of 5 is formed by prefixing locants and $$\lambda ^{5}$$ symbols to the name of the corresponding phosphane. Hydrocarbyl derivatives of PH3 belong to the class @P04553@.
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1357 [Terms] [Paper]