Copper(II) triflate

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Copper(II) triflate
Copper(II) triflate
IUPAC name
Copper(II) trifluoromethanesulfonate
Other names
Copper(II) triflate
3D model (Jmol)
ECHA InfoCard 100.047.531
Molar mass 361.67 g·mol−1
Appearance white to pale blue powder
very soluble, hygroscopic
US health exposure limits (NIOSH):
PEL (Permissible)
TWA 1 mg/m3 (as Cu)[1]
REL (Recommended)
TWA 1 mg/m3 (as Cu)[1]
IDLH (Immediate danger)
TWA 100 mg/m3 (as Cu)[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Copper (II) triflate is the copper(II) salt of trifluoromethanesulfonic acid (known simply as triflic acid) which has a chemical formula of Cu(OSO2CF3)2. This substance, first reported in 1972,[2] is a powerful Lewis acid. It is used as a catalyst in several organic reactions, such as the Diels-Alder reaction[3] and cyclopropanation reactions[4] (much like Rhodium(II) acetate).


  1. ^ a b c "NIOSH Pocket Guide to Chemical Hazards #0150". National Institute for Occupational Safety and Health (NIOSH). 
  2. ^ Jenkins, C.L.; Kochi, J.K. (1972). "Solvolytic Routes via Alkylcopper Intermediates in the Electron-Transfer Oxidation of Alkyl Radicals". Journal of the American Chemical Society. 94 (3): 843–855. doi:10.1021/ja00758a024. 
  3. ^ Evans, D.A.; Miller, S.J.; Lectka, T.; von Matt, P. (1999). "Chiral Bis(oxazoline)copper(II) Complexes as Lewis Acid Catalysts for the Enantioselective Diels−Alder Reaction". Journal of the American Chemical Society. 121 (33): 7559–7573. doi:10.1021/ja991190k. 
  4. ^ Salomon, R.G.; Kochi, J.K (1973). "Copper(I) catalysis in cyclopropanations with diazo compounds. Role of olefin coordination". Journal of the American Chemical Society. 95 (10): 3300–3310. doi:10.1021/ja00791a038.