TY - JOUR
T1 - Reactions of low valent transition-metal complexes with hydrogen peroxide. Are they "fenton-like" or not? 3. The case of fe(II){n(CH2CO2)3}(h2o)2
AU - Bamnolker, Hanna
AU - Cohen, Haim
AU - Meyerstein, Dan
N1 - Funding Information:
We wish to thank Prof. J.H. Espenson and Prof. D. Busch for helpful discussions. This study was supported by the US.-Israel Binational Science Foundation (BSF), Jerusalem, Israel and the Israel Atomic Energy Committee.
PY - 1991
Y1 - 1991
N2 - The reaction of Fe(II){N(CH2CO2)3}(H2O)2 with H2O2 in neutral and slightly acidic solutions was studied. The results indicate that the transient complex formed between these reagents, (nta)(H,O)-Fe2+ · O2H, (where nta = N(CH,CO2)3) reacts either directly with ≫ 0.175 M 2-propanol or 2-methyl-2-propanol, or decomposes into the corresponding tetra-valent iron complex which then reacts with these alcohols. The nature of the final products in this system containing iron ions and nta depends on the pH, thus indicating that the nature of the transient complexes formed, or their relative yields, depend on the pH. The results prove that free hydroxyl radicals are not the major product of this "Fenton like" reaction under the experimental conditions. The implications of these results on the understanding of biological processes is discussed.
AB - The reaction of Fe(II){N(CH2CO2)3}(H2O)2 with H2O2 in neutral and slightly acidic solutions was studied. The results indicate that the transient complex formed between these reagents, (nta)(H,O)-Fe2+ · O2H, (where nta = N(CH,CO2)3) reacts either directly with ≫ 0.175 M 2-propanol or 2-methyl-2-propanol, or decomposes into the corresponding tetra-valent iron complex which then reacts with these alcohols. The nature of the final products in this system containing iron ions and nta depends on the pH, thus indicating that the nature of the transient complexes formed, or their relative yields, depend on the pH. The results prove that free hydroxyl radicals are not the major product of this "Fenton like" reaction under the experimental conditions. The implications of these results on the understanding of biological processes is discussed.
KW - Alcohols
KW - Fenton
KW - Hydrogen-peroxide
KW - Hydroxyl free radical
KW - Iron
KW - Nitrilotriacetate
UR - http://www.scopus.com/inward/record.url?scp=0026286840&partnerID=8YFLogxK
U2 - 10.3109/10715769109049145
DO - 10.3109/10715769109049145
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C2 - 1667774
AN - SCOPUS:0026286840
SN - 1071-5762
VL - 15
SP - 231
EP - 241
JO - Free Radical Research
JF - Free Radical Research
IS - 4
ER -