| 氧原子转移试剂存在条件下金属羰基化合物的CO取代动力学研究 |
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| 引用本文： | 史启祯,高忆慈,王尧宇,刘睦清.氧原子转移试剂存在条件下金属羰基化合物的CO取代动力学研究[J].西北大学学报,1997(4). |
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| 作者姓名： | 史启祯 高忆慈 王尧宇 刘睦清 |
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| 作者单位： | 西北大学化学系，兰州大学化学系，上饶师专化学系 |
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| 基金项目： | 国家自然科学基金,陕西省自然科学基金 |
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| 摘 要： | 氧原子转移试剂存在下金属羰基化合物ＣＯ取代反应动力学的系统研究表明，反应速率对金属羰基化合物、氧原子转移试剂和进入试剂的浓度分别为一级、一级和零级。这表明反应可能为缔合机理，过程涉及转移试剂氧原子在羰碳原子上发生亲核进攻，生成一个良好离去基团ＣＯ２的同时产生了一个活性中间体，后者与进入试剂发生快反应得产物。从金属羰基化合物和氧原子转移试剂两个方面讨论了影响ＣＯ取代反应速率的各种因素。
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| 关 键 词： | 金属羰基化合物 CO取代 氧原子转移 动力学和机理 |
Kinetics and Mechanism of CO Substitution of Metal Carbonyls in the Presence of O atom Transfer Reagents |
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| Shi Qizhen,Gao Yici,Wang Yaoyu,Liu Muqing.Kinetics and Mechanism of CO Substitution of Metal Carbonyls in the Presence of O atom Transfer Reagents[J].Journal of Northwest University(Natural Science Edition),1997(4). |
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| Authors: | Shi Qizhen Gao Yici Wang Yaoyu Liu Muqing |
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| Institution: | Shi Qizhen 1) Gao Yici 2) Wang Yaoyu 1) Liu Muqing 3) |
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| Abstract: | Kinetic studies of CO substitution of metal carbonyls in the presence of O atom transfer reagents show the reaction rates are first order in metal carbonyl and in O atom transfer reagent concentrations, but zero order in entering ligand concentration. This suggests an associative mechanism where a carbonyl carbon atom is attacked by the O atom of the reagent, affording the good leaving group CO 2 and generating an active intermediate which readily reacts with the entering ligand to produce the substituted product. Various factors relating to the metal carbonyls and to the O atom transfer reagents that effect the rates of CO substitution are discussed. |
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| Keywords: | metal carbonyl CO substitution O atom transfer kinetics and mechanism |
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