Polarographic Behaviors of Copper and Cadmium Complexes with 2,2'-Bipyridine and Ethylenediamine in Acetonitrile

摘要

Polarographic behaviors of copper and cadmium complexes with 2,2'-bipyridine and ethylenediamine in acetonitrile have been investigated by the DC and AC polarography. The reduction processes are estimated as follows; Cu(￥±)-bipy. complex e-??E1/2 = +0.1V Cu(￥°)-bipy. complex e-??E1/2 = -0.43V Cu(Hg) Cu(￥±)-en. complex e-??Cu(￥°)-en. complex e-??E1/2 = -0.56V Cu(Hg) Cd(￥±)-bipy. complex e-??E1/2 = -0.57V Cd(￥°)-bipy. complex 2e-??E1/2 = -0.97V Cd(￥°)-bipy. complex Cd(￥±)-en. complex e-??E1/2 = +0.05V Cd(￥°)-en. complex e-??E1/2 = -0.92V Cd(Hg) The limiting currents of all steps are controlled by diffusion. The number of ligand and the dissociation constant for Cu(￥°)-bipy. complex were found to be n = 2 and Kd = (1.5??0.1)??10-7, respectively.