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-

被引:17
作者
BAMNOLKER, H [1 ]
COHEN, H [1 ]
MEYERSTEIN, D [1 ]
机构
[1] BEN GURION UNIV NEGEV,DEPT CHEM,IL-84105 BEER SHEVA,ISRAEL
来源
FREE RADICAL RESEARCH COMMUNICATIONS | 1991年 / 15卷 / 04期
关键词
FENTON; IRON; NITRILOTRIACETATE; HYDROGEN-PEROXIDE; HYDROXYL FREE RADICAL; ALCOHOLS;
D O I
10.3109/10715769109049145
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
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. © 1991 Informa UK Ltd All rights reserved: reproduction in whole or part not permitted.
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页码:231 / 241
页数:11
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