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Structural formula of triphosphane Triphosphine.svg
Structural formula of triphosphane
Ball-and-stick model Triphosphane-3D-balls.png
Ball-and-stick model
Systematic IUPAC name
Triphosphane [1]
Other names
Triphosphine [2]
3D model (JSmol)
PubChem CID
  • InChI=1S/H5P3/c1-3-2/h3H,1-2H2 X mark.svgN
  • PPP
Molar mass 97.96099 g·mol−1
AppearanceColourless gas
Related compounds
Other anions
Related Binary phosphanes
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Triphosphane (IUPAC systematic name) or triphosphine is an inorganic compound having the chemical formula HP(PH2)2. It can be generated from diphosphine but is highly unstable at room temperature: [3]

2 P2H4 → P3H5 + PH3

Samples have been isolated by gas chromatography. The compound rapidly converts to PH3 and the cyclophosphine cyclo-P5H5. [4]

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  1. "triphosphane (CHEBI:35893)". Chemical Entities of Biological Interest (ChEBI). UK: European Bioinformatics Institute. 7 June 2006. Main. Retrieved 27 September 2011.
  2. "Triphosphine". NIST Chemistry WebBook. USA: National Institute of Standards and Technology. Retrieved 27 September 2011.
  3. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN   978-0-08-037941-8.
  4. Marianne Baudler, Klaus Glinka (1993). "Monocyclic and Polycyclic Phosphines". Chem. Rev. 93: 1623–1667. doi:10.1021/cr00020a010.