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Hexafluorophosphazene

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Hexafluorophosphazene
Names
IUPAC name 2,2,4,4,6,6-Hexafluoro-1,3,5,2λ,4λ,6λ-triazatriphosphinine
Other names
  • Phosphonitrilic fluoride trimer
  • Hexafluorotriphosphazene
  • Hexafluorocyclotriphosphazene
  • Triphosphonitrilic fluoride
  • 2,2,4,4,6,6-Hexafluoro-2,2,4,4,6,6-hexahydro-1,3,5,2,4,6-triazatriphosphorine
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.150.019 Edit this at Wikidata
EC Number
  • 621-138-3
PubChem CID
CompTox Dashboard (EPA)
InChI
  • InChI=1S/F6N3P3/c1-10(2)7-11(3,4)9-12(5,6)8-10Key: DKQPXAWBVGCNHG-UHFFFAOYSA-N
  • InChI=1/F6N3P3/c1-10(2)7-11(3,4)9-12(5,6)8-10
SMILES
  • N1=P(N=P(N=P1(F)F)(F)F)(F)F
Properties
Chemical formula (NPF2)3
Molar mass 248.933 g·mol
Appearance White powder or lumps
Melting point 27 °C (81 °F; 300 K)
Boiling point 51 °C (124 °F; 324 K)
Solubility in water decomposes
Solubility Toluene
Structure
Molecular shape Planar P3N3 ring
Dipole moment 0 D
Hazards
Occupational safety and health (OHS/OSH):
Main hazards Corrosive
GHS labelling:
Pictograms GHS05: Corrosive
Signal word Danger
Hazard statements H314
Precautionary statements P260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340+P310, P305+P351+P338+P310, P363, P405, P501
Related compounds
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references
Chemical compound

Hexafluorophosphazene is an inorganic compound with the formula (NPF2)3. It takes the form of a white powder or lumps. It is sensitive to moisture and heat.

Structure

The molecule has a cyclic, unsaturated P3N3 backbone consisting of alternating phosphorus and nitrogen atoms, and can be viewed as a trimer of the hypothetical compound N≡PF2 (phosphazyl difluoride). Its classification as a phosphazene highlights its relationship to benzene. Hexafluorophosphazene has a hexagonal P3N3 ring with six equivalent P–N bonds. Each phosphorus atom is additionally bonded to two fluorine atoms.

The molecule possesses D3h symmetry, and each phosphorus center is tetrahedral.

The P3N3 ring in hexachlorophosphazene deviates from planarity and is slightly ruffled (see chair conformation). By contrast, the P3N3 ring in hexafluorophosphazene is completely planar.

References

  1. ^ "Hexafluorocyclotriphosphazene 15599-91-4 | TCI AMERICA". www.tcichemicals.com.
  2. Allen, Christopher W. (1991-03-01). "Regio- and stereochemical control in substitution reactions of cyclophosphazenes". Chemical Reviews. 91 (2): 119–135. doi:10.1021/cr00002a002. ISSN 0009-2665.
  3. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.


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