Thiophosphoryl fluoride

Thiophosphoryl fluoride
Skeletal formula of thiophosphoryl fluoride
Space-filling model of the thiophosphoryl fluoride molecule
Names
IUPAC name
Trifluoro(sulfanylidene)-λ5-phosphane
Other names
  • Phosphorothioc trifluoride[1]
  • Phosphorothioic trifluoride
  • Phosphorus fluoride sulfide
  • Phosphorus sulfurtrifluoride
  • Phosphorus thiofluoride
  • Thiophosphoryl trifluoride
  • Trifluorophosphine sulfide
  • Trifluoro-λ5-phosphanethione[2]
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/F3PS/c1-4(2,3)5 ☒N
    Key: LHGOOQAICOQNRG-UHFFFAOYSA-N ☒N
  • [3]: FP(F)(F)=S
Properties
PSF3
Molar mass 120.035 g/mol
Appearance Colorless gas or liquid
Density 1.56g/cm3 liquid[4] 4.906 g/L as gas[1]
Melting point −148.8 °C (−235.8 °F; 124.3 K)
Boiling point −52.25 °C (−62.05 °F; 220.90 K)
slight, Highly reactive
Structure
Tetrahedral at the P atom
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
Spontaneously flammable in air; toxic fumes
Flash point very low
Related compounds
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Thiophosphoryl fluoride is an inorganic molecular gas with formula PSF3 containing phosphorus, sulfur and fluorine. It spontaneously ignites in air and burns with a cool flame. The discoverers were able to have flames around their hands without discomfort,[5] and called it "probably one of the coldest flames known".[5] The gas was discovered in 1888.[5]

It is useless for chemical warfare as it burns immediately and is not toxic enough.[6]

  1. ^ a b A likely spelling mistake in Handbook of Chemistry and Physics 87 ed
  2. ^ "FP(F)(F)=S".
  3. ^ "phosphorothioic trifluoride".
  4. ^ Cite error: The named reference hg was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Thorpe was invoked but never defined (see the help page).
  6. ^ Banks, Ronald Eric (2000). Fluorine chemistry at the millennium: fascinated by fluorine. Elsevier. p. 502. ISBN 0-08-043405-3.