Catalytic disproportionation of hydrogen peroxide by the tetranuclear manganese complex [Mn-II(2-OHpicpn)](4)

被引：43
|
作者：
Gelasco, A [1 ]
Askenas, A [1 ]
Pecoraro, VL [1 ]
机构：
[1] UNIV MICHIGAN,DEPT CHEM,ANN ARBOR,MI 48109
来源：
INORGANIC CHEMISTRY | 1996年 / 35卷 / 06期
关键词：
D O I：
10.1021/ic951035g
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The tetranuclear complex [Mn-II(2-OH-picpn)](4+)(4) catalytically disproportionates H2O2 to give H2O and O-2. Saturation kinetics are observed as well as a significant deuterium isotope effect when D2O2 is used as substrate. While this compound exhibits one of the largest V-max values for a manganese catalase mimic, the k(cat)/K-M values are similar to those of other highly reactive manganese models. A speculative model based on iron chemistry may explain the low binding affinity of peroxide for the compound.
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页码：1419 / &
页数：3
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