Lead tetra-acetate oxidation of metallic copper to Cu2+: an unusual oxidation
Abstract
Copper powder is directly oxidised to Cu2+ by lead tetra-acetate in a non-aqueous medium (CH2Cl2) under mild conditions (20–30 °C). In the presence of pyridine or a substituted pyridine, compounds of the type [{Cu(O2CMe)2L}2](L = pyridine, 2-, 3-, or 4-methylpyridine) are obtained in very high yields. The mononuclear complex [Cu(O2CMe)2(bipy)] is readily obtained by the oxidation of copper powder by Pb(O2CMe)4 in the presence of 2,2′-bipyridyl (bipy) by this simple procedure.