Journal of Radioanalytical and Nuclear Chemistry
Volume/Issue:
Volume 191: Issue 2

One electron oxidation of Ni(II)-iminodiacetate by carbonate radical

Authors:
P. Mandal Saha Institute of Nuclear Physics Nuclear Chemistry Division 1/AF, Bidhannagar 700 064 Calcutta (India)

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D. Bardhan Saha Institute of Nuclear Physics Nuclear Chemistry Division 1/AF, Bidhannagar 700 064 Calcutta (India)

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S. Bhattacharyya Saha Institute of Nuclear Physics Nuclear Chemistry Division 1/AF, Bidhannagar 700 064 Calcutta (India)

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Pages:
349–359
Online Publication Date:
14 Aug 2005
Publication Date:
17 Apr 1995
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf02038231
Restricted access

Abstract  

Reactions of carbonate radical (CO3–), generated by photolysis or by radiolysis of a carbonate solution with nickel(II)-iminodiacetate (Ni(II)IDA) were studied at pH 10.5 and ionic strength (I)==0.2 mol·dm–3. The stable product arising from the ligand degradation in the complex is mainly glyxalic acid. Time-resolved spectroscopy and transient kinetics were studied using flash photolysis. From the kinetic data it was suggested that the carbonate radical initially reacts with Ni(III)IDA with a rate constant (2.4±0.4)·106 dm3·mol–1·s–1 to form a Ni(II)IDA species which, however, undergoes a first-order transformation (k=2.7·102·s–1) to give a radical intermediate of the type Ni(II)RNHCHCO 2– ) which rapidly forms an adduct containing a Ni–C bond. This adduct decays very slowly to give rise to glyoxalic acid. From a consideration of equilibrium between Ni(II)IDA and Ni(III)IDA, the one electron reduction potential for the Ni(III)IDA/Ni(II)IDA couple was determined to be 1.467 V.

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Cover Journal of Radioanalytical and Nuclear Chemistry
Journal of Radioanalytical and Nuclear Chemistry
Print ISSN:
0236-5731
Online ISSN:
1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation		 1968
Volumes
per Year		 1
Issues
per Year		 12
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)

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