phosphanen.
/ˈfɒsfeɪn/, U.S. /ˈfɑsˌfeɪn/ Chemistry.
A hydride of (esp. trivalent) phosphorus; spec. = phosphine n. 1. Also: a substituted derivative of such a compound.Phosphane is now the recommended IUPAC name for phosphine in most contexts.
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1952 Chem. & Engin. News 2 June 2336/2 PH5 is phosphorane (not phosphane, as the latter name is used in the series diphosphane, triphosphane, and so on).
1970 Jrnl. Chem. Documentation 10 183 (C6H5)3P=CH2 a phosphane.
1989 tr. C. Elschenbroich & A. Salzer Organometallics viii. 112 Silyl anions R3Si− are isoelectronic with phosphanes R3P.
1995 D. M. P. Mingos Essent. Inorg. Chem. (1997) 67 In hypervalent compounds the valency is indicated by a superscript added to the Greek letter λ: PH5λ5-phosphane; SeH6λ6-selenane.
2000 New Scientist 26 Aug. 89/4 If diphosphane (P2H4), which is often present in phosphane as an impurity, reacts spontaneously with air it could ignite the methane to create a weak blue flame.
This is a new entry (OED Third Edition, March 2006; most recently modified version published online March 2022).
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