| 固氮酶活性中心FeMo-Cofactor对N2活化方式的探讨 |
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| 引用本文： | 张纯喜,樊红军,刘秋田.固氮酶活性中心FeMo-Cofactor对N2活化方式的探讨[J].化学进展,1997,9(3):265-272. |
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| 作者姓名： | 张纯喜 樊红军 刘秋田 |
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| 作者单位： | 中国科学院福建物质结构研究所结构化学国家重点实验室 |
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| 基金项目： | 国家攀登计划,国家自然科学基金 |
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| 摘 要： | 结合实验和理论计算的结果, 讨论了固氮酶的活性中心铁钼辅基(FeMo-co-facto r) 对N2 的各种活化方式, 并在此基础上提出了一种新模型, 即N2 在FeMo2cofacto r 的内部以“4Fe 端基配位+2Fe 侧基配位”的方式被活化,N2 的三重键完全断裂, 断裂产生的两个含N 的碎片分别偏向两侧的“窗口”, 再在H 的进攻下被还原为NH3, 并分别从两侧的“窗口”离去。
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| 关 键 词： | 固氮酶 铁钼铺基 N2的活化 活化模型 |
| 收稿时间： | 1996-08-01 |
| 修稿时间： | 1996-12-01 |
Discussion on the Activation Models of Dinitrogen by FeMo-Cofactor in Nitrogenase |
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| Zhang Chunxi,Fan Hongjun,Liu Qiutian.Discussion on the Activation Models of Dinitrogen by FeMo-Cofactor in Nitrogenase[J].Progress in Chemistry,1997,9(3):265-272. |
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| Authors: | Zhang Chunxi Fan Hongjun Liu Qiutian |
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| Institution: | (State Key Laboratory of Structural Chemistry, Fu jian Institute of Research on the Structure of Matter, Chinese Acadamy of Sciences, Fuzhou 350002, China) |
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| Abstract: | On discussing some activation models of dinitrogen by the active center,FeMo-cofactor of the nitrogenase based on experiments and theoretical calculations, a new activation model of dinitrogen has been suggested. In this model, the dinitrogen is coordinated to 4Fe and 2Fe atoms of FeMo-cofactor in“end-on”and“side-on”modes respectively, and is activated inside the FeMo-cofactor. Accompanying the complete cleavage of N≡N triple bond, both fragments containing Natomshift to the respective“window”on both sides of the FeMo-cofactor and are reduced in the hydrogenation process to form NH3which get off from the nearby“windows”. |
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| Keywords: | nitrogenase FeMo cofactor activation of dinitrogen activation models |
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