On the mechanism of reduction of maleate by a Co(I) complex with a macrocylic ligand in aqueous solutions

Osnat Schutz; Alexandra Masarwa; Israel Zilbermann; Eric Maimon; Haim Cohen; Dan Meyerstein

doi:10.1080/00958972.2010.499938

On the mechanism of reduction of maleate by a Co(I) complex with a macrocylic ligand in aqueous solutions

Osnat Schutz, Alexandra Masarwa, Israel Zilbermann, Eric Maimon, Haim Cohen, Dan Meyerstein

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Recently, it was shown that a Ni(I) complex with a tetraazamacrocyclic ligand (Ni^I(1, 4, 8, 11-tetraazacyclotetradecane)⁺, Ni(I)L⁺₂, cyclam), reduces maleate in aqueous solutions. It was decided to investigate whether this is a general reaction of low valent transition metal complexes. In this study, the reactions of Co^IL ⁺ (L = 5, 7, 7, 12, 14, 14-hexamethyl-1, 4, 8, 11- tetraazacyclotetradeca-4, 11-diene) with maleate were investigated. The effect of the addition of maleate to aqueous solutions containing this low valent metal complex, prepared via the pulse radiolysis technique, was studied. The d →* complexes formed between the monovalent cobalt complex and maleate were detected and characterized by UV-Vis spectroscopy. The nature of the final products formed was studied and detailed mechanisms of the reduction processes are proposed. The mechanism and kinetics of the reaction of Co(I)L⁺ with maleate was studied applying pulse-radiolysis and analysis of the final products.

Original language	English
Pages (from-to)	2528-2541
Number of pages	14
Journal	Journal of Coordination Chemistry
Volume	63
Issue number	14-16
DOIs	https://doi.org/10.1080/00958972.2010.499938
State	Published - 20 Jul 2010
Externally published	Yes

Bibliographical note

Funding Information:
This study was supported in part by a grant from the Budgeting and Planning Committee of The Council of Higher Education, and the Israel Atomic Energy Commission.

Funding

This study was supported in part by a grant from the Budgeting and Planning Committee of The Council of Higher Education, and the Israel Atomic Energy Commission.

Funders	Funder number
Planning and Budgeting Committee of the Council for Higher Education of Israel
Israel Atomic Energy Commission

Keywords

Cobalt macrocyclic complex
Kinetics and mechanism
Maleate
Reduction

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10.1080/00958972.2010.499938

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title = "On the mechanism of reduction of maleate by a Co(I) complex with a macrocylic ligand in aqueous solutions",

abstract = "Recently, it was shown that a Ni(I) complex with a tetraazamacrocyclic ligand (NiI(1, 4, 8, 11-tetraazacyclotetradecane)+, Ni(I)L+2, cyclam), reduces maleate in aqueous solutions. It was decided to investigate whether this is a general reaction of low valent transition metal complexes. In this study, the reactions of CoIL + (L = 5, 7, 7, 12, 14, 14-hexamethyl-1, 4, 8, 11- tetraazacyclotetradeca-4, 11-diene) with maleate were investigated. The effect of the addition of maleate to aqueous solutions containing this low valent metal complex, prepared via the pulse radiolysis technique, was studied. The d →* complexes formed between the monovalent cobalt complex and maleate were detected and characterized by UV-Vis spectroscopy. The nature of the final products formed was studied and detailed mechanisms of the reduction processes are proposed. The mechanism and kinetics of the reaction of Co(I)L+ with maleate was studied applying pulse-radiolysis and analysis of the final products.",

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author = "Osnat Schutz and Alexandra Masarwa and Israel Zilbermann and Eric Maimon and Haim Cohen and Dan Meyerstein",

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AU - Schutz, Osnat

AU - Masarwa, Alexandra

AU - Zilbermann, Israel

AU - Maimon, Eric

AU - Cohen, Haim

AU - Meyerstein, Dan

N1 - Funding Information: This study was supported in part by a grant from the Budgeting and Planning Committee of The Council of Higher Education, and the Israel Atomic Energy Commission.

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N2 - Recently, it was shown that a Ni(I) complex with a tetraazamacrocyclic ligand (NiI(1, 4, 8, 11-tetraazacyclotetradecane)+, Ni(I)L+2, cyclam), reduces maleate in aqueous solutions. It was decided to investigate whether this is a general reaction of low valent transition metal complexes. In this study, the reactions of CoIL + (L = 5, 7, 7, 12, 14, 14-hexamethyl-1, 4, 8, 11- tetraazacyclotetradeca-4, 11-diene) with maleate were investigated. The effect of the addition of maleate to aqueous solutions containing this low valent metal complex, prepared via the pulse radiolysis technique, was studied. The d →* complexes formed between the monovalent cobalt complex and maleate were detected and characterized by UV-Vis spectroscopy. The nature of the final products formed was studied and detailed mechanisms of the reduction processes are proposed. The mechanism and kinetics of the reaction of Co(I)L+ with maleate was studied applying pulse-radiolysis and analysis of the final products.

AB - Recently, it was shown that a Ni(I) complex with a tetraazamacrocyclic ligand (NiI(1, 4, 8, 11-tetraazacyclotetradecane)+, Ni(I)L+2, cyclam), reduces maleate in aqueous solutions. It was decided to investigate whether this is a general reaction of low valent transition metal complexes. In this study, the reactions of CoIL + (L = 5, 7, 7, 12, 14, 14-hexamethyl-1, 4, 8, 11- tetraazacyclotetradeca-4, 11-diene) with maleate were investigated. The effect of the addition of maleate to aqueous solutions containing this low valent metal complex, prepared via the pulse radiolysis technique, was studied. The d →* complexes formed between the monovalent cobalt complex and maleate were detected and characterized by UV-Vis spectroscopy. The nature of the final products formed was studied and detailed mechanisms of the reduction processes are proposed. The mechanism and kinetics of the reaction of Co(I)L+ with maleate was studied applying pulse-radiolysis and analysis of the final products.

KW - Cobalt macrocyclic complex

KW - Kinetics and mechanism

KW - Maleate

KW - Reduction

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On the mechanism of reduction of maleate by a Co(I) complex with a macrocylic ligand in aqueous solutions

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