TY - JOUR
T1 - On the mechanism of reduction of maleate by a Co(I) complex with a macrocylic ligand in aqueous solutions
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.
PY - 2010/7/20
Y1 - 2010/7/20
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
UR - http://www.scopus.com/inward/record.url?scp=77955879223&partnerID=8YFLogxK
U2 - 10.1080/00958972.2010.499938
DO - 10.1080/00958972.2010.499938
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AN - SCOPUS:77955879223
SN - 0095-8972
VL - 63
SP - 2528
EP - 2541
JO - Journal of Coordination Chemistry
JF - Journal of Coordination Chemistry
IS - 14-16
ER -