Synthesis and Structure of Surprisingly Stable Tetrakis(trifluoromethyl)cuprate(<scp>III</scp>) Salts

CF3 groups stabilize the CuIII center in the complex anion [Cu(CF3)4]− (1). Salts of 1 with large cations are easy to prepare by oxidation of CuI-CF3 compounds with, for example, I2. The CuIII center in 1 has approximately square-planar coordination geometry, and the F atoms form one planar hexagon above the CuC4 plane and one below. • Cu, ◯  C,  F.