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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 39, Number 4
JKCSEZ 39(4)
August 20, 1995 

A Study on Complexation of Cu(Ⅱ) Ion with Hydrazide Schiff Base Ligands
Hwee-Kyung Cho, Bun-Hee Cha, Young-Ae Hur, Kyu-Seong Choi*
이미 합성된 Hydrazide schiff base 리간드인 N,N'-oxalylbis(salicylaldehydehydrazone)(OBSH)과 N,N'-malonylbis(salicylaldehydehydrazone)(MBSH) N,N'-succinylbis(salicylaldehydehydrazone)(SBSH)의 양성자 첨가반응에 대한 평형상수와 그들 각각의 리간드들과 Cu(Ⅱ) 이온과의 착물 형성에 따르는 안정도 상수를 양성자를 첨가한 95% DMF 용액에서 전위차 적정법을 사용하여 측정하였다. 리간드에 대한 양성자 첨가반응의 평형상수는 SBSHCopper(Ⅱ) complexes with N,N'-oxalylbis(salicylaldehydehydrazone), N,N'-malonylbis(salicylaldehydehydrazone) and N,N'-succinylbis(salicylaldehydehydrazone) have been prepared in 95% DMF. Their protonation and stability constants were investigated by potentiometric titration. We observed that MBSH ligand showed the largest protonation constant. The values of the protonation constants among three different ligands were increased as following order SBSH < OBSH < MBSH. However, the increasing order of stability constants was somewhat different such as Cu(Ⅱ)-SBSH < Cu(Ⅱ)-MBSH < Cu(Ⅱ)-OBSH. In addition, thermodynamic parameters, ΔH and ΔS of Cu(Ⅱ) complexes have been studied. As a result, we found the SBSH ligand produced the best stable copper (Ⅱ) complex.
281 - 287
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