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

Hanna Bamnolker; Haim Cohen; Dan Meyerstein

doi:10.3109/10715769109049145

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

Hanna Bamnolker, Haim Cohen, Dan Meyerstein

Ben-Gurion University of the Negev

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

18 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	231-241
Number of pages	11
Journal	Free Radical Research
Volume	15
Issue number	4
DOIs	https://doi.org/10.3109/10715769109049145
State	Published - 1991
Externally published	Yes

Bibliographical note

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.

Keywords

Alcohols
Fenton
Hydrogen-peroxide
Hydroxyl free radical
Iron
Nitrilotriacetate

Access to Document

10.3109/10715769109049145

Cite this

@article{ae9c4de00f7e48009c5726ed95f4ce2d,

title = "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",

abstract = "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.",

keywords = "Alcohols, Fenton, Hydrogen-peroxide, Hydroxyl free radical, Iron, Nitrilotriacetate",

author = "Hanna Bamnolker and Haim Cohen and Dan Meyerstein",

note = "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.",

year = "1991",

doi = "10.3109/10715769109049145",

language = "אנגלית",

volume = "15",

pages = "231--241",

journal = "Free Radical Research",

issn = "1071-5762",

publisher = "Informa Healthcare",

number = "4",

}

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

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

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 -