Density 1.68 g/cm³ Chemical formula C2F6O5S2 Pubchem 67749 | Molar mass 282.13 g·mol−1 R-phrases R14 R34 Boiling point 82 °C (180 °F; 355 K) | |
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Triflic anhydride is the chemical compound with the formula (CF3SO2)2O. This compound is a particularly strong electrophile, useful for introducing the triflyl group, CF3SO2. Triflic anhydride is the acid anhydride of the strong acid triflic acid, CF3SO2OH.
It can be assayed by 19F NMR spectroscopy: −72.6 ppm vs. -77.3 for TfOH (std CFCl3).
Illustrative uses
In a representative application, is used to convert an imine into a NTf group.
It will convert phenols into a triflic ester, which enables cleavage of the C-O bond.
References
Trifluoromethanesulfonic anhydride Wikipedia(Text) CC BY-SA