Electrochemical Reductions of Ni2+, Cu2+ and Zn2+ Complexes of Azinyl Methyl Ketoximes on Mercury

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Title:Electrochemical Reductions of Ni2+, Cu2+ and Zn2+ Complexes of Azinyl Methyl Ketoximes on Mercury
Creators:
Cibulka, Radek
Císařová, Ivana
Ondráček, Jan
Liška, František
Ludvík, Jiří
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 66, 1, pp. 170-184
Uncontrolled Keywords:Nickel, Zinc, Oximes, Azines, Micellar catalysts, Crystal structure determination, Copper, Polarography, Electrochemistry, Electroreductions

Abstract

Electroreductions of Ni<sup>2+</sup>, Cu<sup>2+</sup> and Zn<sup>2+</sup> complexes of azinyl (pyridin-2-yl, pyridazin-3-yl, pyrimidin-2-yl, pyrimidin-4-yl, pyrazinyl) methyl ketoximes on mercury electrode were studied using dc polarography. Three different types of complex behavior on the mercury electrode were observed: In the Ni<sup>2+</sup> complexes, the hydroxyimino group of the ligand is reduced, whereas in the Cu<sup>2+</sup> complexes, the reduction proceeds on the metal ion. With Zn<sup>2+</sup> complex of methyl pyridin-2-yl ketoxime, only reduction waves of the uncoordinated ligand and metal were observed due to a rapid decomplexation pre-equilibrium. The structure of [Zn(methyl pyridin-2-yl ketoxime)<sub>2</sub>(NO<sub>3</sub>)<sub>2</sub>], isolated from water-ethanolic solution, was determined by X-ray diffraction. The distorted octahedral coordination sphere around the zinc atom, made up of two pyridine and two oxime nitrogen atoms and two nitrate oxygen atoms, was verified. <p>

Title:Electrochemical Reductions of Ni2+, Cu2+ and Zn2+ Complexes of Azinyl Methyl Ketoximes on Mercury
Creators:
Cibulka, Radek
Císařová, Ivana
Ondráček, Jan
Liška, František
Ludvík, Jiří
Uncontrolled Keywords:Nickel, Zinc, Oximes, Azines, Micellar catalysts, Crystal structure determination, Copper, Polarography, Electrochemistry, Electroreductions
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:66
Number:1
Page Range:pp. 170-184
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc20010170UNSPECIFIED
ID Code:1784
Item Type:Article
Deposited On:06 Feb 2009 17:12
Last Modified:06 Feb 2009 16:12

Citation

Cibulka, Radek; Císařová, Ivana; Ondráček, Jan; Liška, František; Ludvík, Jiří (2001) Electrochemical Reductions of Ni2+, Cu2+ and Zn2+ Complexes of Azinyl Methyl Ketoximes on Mercury. Collection of Czechoslovak Chemical Communications, 66 (1). pp. 170-184. ISSN 0010-0765

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