Phosphoryl fluoride - Misplaced Pages

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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

CAS Number

13478-20-1

3D model (JSmol)

ChemSpider

75351

ECHA InfoCard

100.033.419

EC Number

236-776-4

PubChem CID

83516

UNII

J2907TX5WS

CompTox Dashboard (EPA)

DTXSID1065504

InChI

InChI=1S/F3OP/c1-5(2,3)4Key: FFUQCRZBKUBHQT-UHFFFAOYSA-N
InChI=1/F3OP/c1-5(2,3)4Key: FFUQCRZBKUBHQT-UHFFFAOYAJ

SMILES

F(F)(F)
FP(F)(F)=O

Properties

Chemical formula

POF₃

Molar mass

103.9684 g/mol

Appearance

Colourless gas

Boiling point

−39.7 °C (−39.5 °F; 233.5 K)

Solubility in water

Reacts

Solubility

Reacts with alcohol and acid, soluble in diethyl ether and hydrocarbons

Dipole moment

1.76 D

Structure

Molecular shape

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:

Pictograms

Signal word

Danger

Hazard statements

H302, H314, H330, H372

Precautionary statements

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)

3 0 2

Safety data sheet (SDS)

ICSC 0190

Related compounds

Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Chemical compound

Phosphoryl fluoride (commonly called phosphorus oxyfluoride) is a compound with the chemical formula P O F₃. It is a colorless gas that hydrolyzes rapidly. It has a critical temperature of 73 °C and a critical pressure of 4.25 bars.

Synthesis and reactions

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.