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Names | |
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IUPAC name Copper(II) trifluoromethanesulfonate | |
Other names Copper(II) triflate | |
Identifiers | |
3D model (JSmol) | |
ChemSpider | |
ECHA InfoCard | 100.047.531 |
EC Number |
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PubChem CID | |
CompTox Dashboard (EPA) | |
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Properties | |
C2CuF6O6S2 | |
Molar mass | 361.67 g·mol−1 |
Appearance | white to pale blue powder |
very soluble, hygroscopic | |
Hazards | |
NIOSH (US health exposure limits): | |
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). |
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, abbreviated Cu(OTf)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).