Illustrated Glossary of Organic Chemistry

Trifluoromethanesulfonic acid (triflic acid; TfOH): An aliphatic sulfonic acid, often used as a strong acid catalyst (pKa -12 to -16). Because its pKa is below -10 trifluoromethanesulfonic acid is a superacid.

Molecular Structure of Trifluoromethanesulfonic Acid





Lewis structure
    
Ball and spoke
    
Space-filling model