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KMID : 1059519860300010051
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Journal of the Korean Chemical Society
1986 Volume.30 No. 1 p.51 ~ p.56
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Polarographic Behavior of Cadmium (II) and Copper (II) Complexes of 1,5-Diphenylcarbohydrazide in Dimethylsulfoxide
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Choi Chil-Nam
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Abstract
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Polarographic behavior of cadmium(Ⅱ) and copper (Ⅱ) complexes of 1,5-diphenylcarbohydrazide in dimethylsulfoxide have been investigated by the DC polarography. The reduction processes are estimated as follows; Cd(Ⅱ)·DPH Complex e-→(E1/2 = -0.12V) Cd(Ⅰ)·DPH Complex. Cd(Ⅰ)·DPH Complex e-→(E1/2 = -0.74V) Cd(Hg) + nDPH. Cu(Ⅱ)·DPH Complex e-→(E1/2 = -0.44V) Cu(Ⅰ)·DPH Complex. Cu(Ⅰ)·DPH Complex e-→(E1/2 = -0.84V) Cu(Hg) + nDPH. The limiting currents of all reduction wave are irreversible. The number of ligand and the dissociation constant for Cu(Ⅰ)·1.5-diphenylcarbohydrazide complex were found to be 2 and 5.12 × 10-8, respectively. All reduction waves of complexes are irreversible. Based on the experimental results, the polarographic reductions of complexes in dimethylsulfoxide solution occurred in two one-electron steps.
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