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Trifluoromethanesulfonic anhydride, also known as triflic anhydride, is the chemical compound with the formula (CF 3 SO 2) 2 O. It is the acid anhydride derived from triflic acid . This compound is a strong electrophile , useful for introducing the triflyl group , CF 3 SO 2 .
Triflic acid, the short name for trifluoromethanesulfonic acid, TFMS, TFSA, HOTf or TfOH, is a sulfonic acid with the chemical formula CF 3 SO 3 H. It is one of the strongest known acids . Triflic acid is mainly used in research as a catalyst for esterification .
The corresponding triflate anion, CF 3 SO − 3, is an extremely stable polyatomic ion; this comes from the fact that triflic acid (CF 3 SO 3 H) is a superacid; i.e. it is more acidic than pure sulfuric acid, already one of the strongest acids known.
Trifluoromethanesulfonyl azide is prepared by treating trifluoromethanesulfonic anhydride with sodium azide, traditionally in dichloromethane. [1] However, the use of dichloromethane is avoided since it can generate highly explosive azido-chloromethane and diazidomethane.
The simplest example of a perfluorosulfonic acid is the trifluoromethanesulfonic acid. Perfluorosulfonic acids with six or more perfluorinated carbon atoms, i.e. from perfluorohexanesulfonic acid onwards, are referred to as long-chain. [1] Perfluorooctanesulfonic acid Trifluoromethanesulfonic acid
Commercially available superacids include trifluoromethanesulfonic acid (CF 3 SO 3 H), also known as triflic acid, and fluorosulfuric acid (HSO 3 F), both of which are about a thousand times stronger (i.e. have more negative H 0 values) than sulfuric acid.
Category: Acid anhydrides. ... Trifluoromethanesulfonic anhydride This page was last edited on 28 January 2020, at 20:44 (UTC). Text is available under the ...
The trifluoromethyl group has a significant electronegativity that is often described as being intermediate between the electronegativities of fluorine and chlorine. [1] For this reason, trifluoromethyl-substituted compounds are often strong acids, such as trifluoromethanesulfonic acid and trifluoroacetic acid.
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