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Tropylium tetrafluoroborate

From Wikipedia, the free encyclopedia
Tropylium tetrafluoroborate
Names
Preferred IUPAC name
Cycloheptatrienylium tetrafluoroboranuide
Other names
Cycloheptatrienyl tetrafluoroborate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.043.816 Edit this at Wikidata
EC Number
  • 248-214-5
UNII
  • InChI=1S/C7H7.BF4/c1-2-4-6-7-5-3-1;2-1(3,4)5/h1-7H;/q+1;-1
    Key: SQVQHTIKOZVGLR-UHFFFAOYSA-N
  • F[B-](F)(F)F.c1[cH+]ccccc1
Properties
[C7H7]+[BF4]
Molar mass 177.94 g·mol−1
Appearance white solid
Melting point 200 °C (392 °F; 473 K) decomposition
Hazards
GHS labelling:
GHS05: Corrosive
Danger
H314
P260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P405, P501
Related compounds
Other anions
Tetrafluoroborate
Other cations
Tropylium
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Tropylium tetrafluoroborate is an organic compound with the formula [C7H7]+[BF4]. Containing the tropylium cation and the non-coordinating tetrafluoroborate counteranion, tropylium tetrafluoroborate is a rare example of a readily isolable carbocation. It is a white solid.[1]

This compound may be prepared by the reaction of cycloheptatriene with phosphorus pentachloride, followed by tetrafluoroboric acid.[1][2]

See also

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References

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  1. ^ a b Kenneth Conrow (1963). "Tropylium Tetrafluoroborate". Org. Synth. 43: 101. doi:10.15227/orgsyn.043.0101.
  2. ^ Kane, John L.; Danheiser, Rick L. (2001). "Tropylium Tetrafluoroborate". Encyclopedia of Reagents for Organic Synthesis. doi:10.1002/047084289X.rt429. ISBN 0-471-93623-5.