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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 12, Number 4
BKCSDE 12(4)
April 20, 1991 

Electrochemical Study of Nickel(Ⅱ) Complexes with Diaza-Macrocyclic Ligands in Acetonitrile
Moo-Lyong Seo*, Zun-Ung Bae, Tae-Myoung Park
The electrochemical behavior and the complex formation between Ni2+ and 1,7-diazs-15-crown-5 and 1,10-diaza-18-crown-6 in acetonitrile solution have been studied by DC polarography, differential puke polarography and cyclic voltammetry. Nickel(Ⅱ) complexes gave a single well-defined wave. The formation constants of their complexes were 104.89 and 103.86, respectively. Nickel(Ⅱ) ion was found to form complexes of 1-to-1 composition with 1,7-diaza-15-crown-5 and 1,10-diaza-18-crown-6. In addition, reduction steps were irreversible and the reduction current were diffusion controlled. The electrochemical reduction mechanism of Ni(Ⅱ)-macrocyclic diaza-crown complexes in acetonitrile solution is estimated.
368 - 370
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