Copper(I) thiophene-2-carboxylate

Copper(I) thiophene-2-carboxylate or CuTC is a thiophene and a reagent in organic chemistry that especially promotes the Ullmann reaction between aryl halides.[3]

Copper(I) thiophene-2-carboxylate[1]
IUPAC name
Copper(I) thiophene-2-carboxylate
Other names
3D model (JSmol)
ECHA InfoCard 100.161.358
Molar mass 190.68 g·mol−1
Main hazards Irritant (Xi)
R-phrases (outdated) R36/37/38
S-phrases (outdated) S26
NIOSH (US health exposure limits):
PEL (Permissible)
TWA 1 mg/m3 (as Cu)[2]
REL (Recommended)
TWA 1 mg/m3 (as Cu)[2]
IDLH (Immediate danger)
TWA 100 mg/m3 (as Cu)[2]
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


  1. Copper(I) thiophene-2-carboxylate at Sigma-Aldrich
  2. NIOSH Pocket Guide to Chemical Hazards. "#0150". National Institute for Occupational Safety and Health (NIOSH).
  3. Shijie Zhang; Dawei Zhang; Lanny S. Liebeskind (1997). "Ambient Temperature, Ullmann-like Reductive Coupling of Aryl, Heteroaryl, and Alkenyl Halides". J. Org. Chem. 62 (8): 2312–2313. doi:10.1021/jo9700078. PMID 11671553.
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