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Phosphoryl fluoride

(Redirected from Phosphorus oxyfluoride)

Phosphoryl fluoride (commonly called phosphorus oxyfluoride) is a compound with the chemical formula POF3. It is a colorless gas that hydrolyzes rapidly. It has a critical temperature of 73 °C and a critical pressure of 4.25 bars.[1]

Phosphoryl fluoride
Names
IUPAC names
Phosphoryl trifluoride
Phosphorus trifluoride oxide
Other names
  • Phosphorus oxyfluoride
  • Phosphorus oxide trifluoride
  • Phosphorus(V) oxide trifluoride
  • Trifluorophosphine oxide
  • Trifluorophosphine P-oxide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.033.419 Edit this at Wikidata
EC Number
  • 236-776-4
UNII
  • InChI=1S/F3OP/c1-5(2,3)4
    Key: FFUQCRZBKUBHQT-UHFFFAOYSA-N
  • InChI=1/F3OP/c1-5(2,3)4
    Key: FFUQCRZBKUBHQT-UHFFFAOYAJ
  • F[P+](F)(F)[O-]
  • FP(F)(F)=O
Properties
POF3
Molar mass 103.9684 g/mol
Appearance Colourless gas
Boiling point −39.7 °C (−39.5 °F; 233.5 K)
Reacts
Solubility Reacts with alcohol and acid, soluble in diethyl ether and hydrocarbons
1.76 D[1]
Structure
Tetrahedral at the P atom
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Poison, corrosive, can form HF on contact with H2O
GHS labelling:
GHS05: CorrosiveGHS06: ToxicGHS07: Exclamation markGHS08: Health hazard
Danger
H302, H314, H330, H372
P260, P264, P270, P271, P280, P284, P301+P312, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P314, P320, P321, P330, P363, P403+P233, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 0: Will not burn. E.g. waterInstability 2: Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water. E.g. white phosphorusSpecial hazards (white): no code
3
0
2
Safety data sheet (SDS) ICSC 0190
Related compounds
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Synthesis and reactions

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Phosphorus oxyfluoride is prepared by partial hydrolysis of phosphorus pentafluoride.

Phosphorus oxyfluoride is the progenitor of the simple fluorophosphoric acids by hydrolysis. The sequence starts with difluorophosphoric acid:

POF3 + H2O → HPO2F2 + HF

The next steps give monofluorophosphoric acid and phosphoric acid:

HPO2F2 + H2O → H2PO3F + HF
H2PO3F + H2O → H3PO4 + HF

Phosphoryl fluoride combines with dimethylamine to produce dimethylaminophosphoryl difluoride (H3C−)2N−P(=O)F2 and difluorophosphate and hexafluorophosphate ions.[2]

References

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  1. ^ a b "Phosphoryl fluoride".
  2. ^ Cavell, R. G. (1968). "Chemistry of phosphorus fluorides. Part III. The reaction of thiophosphoryl-fluoride with dimethylamine and some properties of the dimethylaminothio- phosphoryl fluorides". Canadian Journal of Chemistry. 46 (4): 613. doi:10.1139/v68-100.
 
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