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]
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| Names | |||
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| Preferred IUPAC name
Cycloheptatrienylium tetrafluoroboranuide | |||
| Other names
Cycloheptatrienyl tetrafluoroborate
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| Identifiers | |||
3D model (JSmol)
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| ChemSpider | |||
| ECHA InfoCard | 100.043.816 | ||
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PubChem CID
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CompTox Dashboard (EPA)
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| 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: | |||
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| 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
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Tetrafluoroborate | ||
Other cations
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Tropylium | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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This compound may be prepared by the reaction of cycloheptatriene with phosphorus pentachloride, followed by tetrafluoroboric acid.[1][2]
See also
edit- Triphenylmethyl chloride, also known as trityl chloride.
References
edit- ^ a b Kenneth Conrow (1963). "Tropylium Tetrafluoroborate". Org. Synth. 43: 101. doi:10.15227/orgsyn.043.0101.
- ^ 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.