Current time in Korea 03:04 Aug 14 (Fri) Year 2020 KCS KCS Publications
KCS Publications
My Journal  Log In  Register
HOME > Search > Browsing(JKCS) > Archives

Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 30, Number 1
JKCSEZ 30(1)
February 20, 1986 

 
Title
Polarographic Behavior of Cadmium (Ⅱ) and Copper (Ⅱ) Complexes of 1,5-Diphenylcarbohydrazide in Dimethylsulfoxide

디메틸술폭시드 속에서 1,5-디페닐카르보히드라지드의 카드뮴 (Ⅱ) 및 구리 (Ⅱ) 착물에 대한 폴라로그래피적 거동
Author
Chil-Nam Choe

최칠남
Keywords
Abstract
디메틸술폭시드 속에서 카드뮴(Ⅱ)과 구리(Ⅱ)의 1,5-diphenylcarbohydrazide 착물의 성질을 직류 폴라로그래프로 조사한 결과 각 착물의 전극과정은 다음과 같이 생각된다. 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. 모든 파는 확산에만 의존하고, 또 Cd(Ⅰ)·DPH 착물의 ligand의 자리수는 2이며, 착물의 해리상수 Kd는 5.12 × 10-8이었다. 이들 각 착물의 환원파는 비가역적이었으며, 디메틸 술폭시드 용액 속에서 착물들의 환원파는 1전자 2단계임을 알 수 있다.

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.

Page
51 - 56
Full Text
PDF