Seleno- and Tellurocarbenium Ions

Abstract: α-Chalcogeno substituted carbenium salts [(RX)3C]+ PF6-(X = S, Se, Te; R = 2,4,6-iPr3C6H2) obtained from reaction of the copper complexes [(bipy)CuXR] with CBr4 are stabilized to the same extent; but the electronic mechanism is very different.