(p-CH_3OC_6H_4)_2TeO存在下M_2(CO)_(10)(M=Mn,Re)的CO取代反应动力学研究  

Kinetics of CO Substitution of M_2(CO)_(10)(M=Mn,Re) with Py in the Presence of (p-CH_2OC_2H_4)_2TeO

作　　者：高忆慈[1] 申建坤[1] 史启祯[1] 

机构地区：[1]兰州大学化学系,兰州730000

出　　处：《高等学校化学学报》1993年第4期548-551,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金

摘　　要：测定了(p-CH_3OC_6H_4)_2TeO存在下M_2(CO)_(10)(M=Mn,Re)的CO取代反应速率及活化参数。其表观速率常数分别与M_2(CO)_(10)和(p-CH_3OC_6H_4)_2TeO的浓度的一次方成正比。本文所建议的缔合机理与前人用(CH_3)_3NO作氧原子转移试剂的相应反应所提出的机理相似。讨论了在(CH_3)_3NO和(p-CH_3OC_6H_4)_2TeO存在下影响M_2(CO)_(10)的CO取代反应速率的因素。Reported are the rates of reaction and activation parameters for CO substitution reaction of M2(CO)10(M = Mn,Re) with Py in the presence of (p-CH3OCeH4)2TeO. The rate of reaction is the first order in concentrations of M2(CO)10 and of (p-CH3OC6H4)2TeO, but zero order in Py. One possible mechanism.is suggested for the reaction, which is similar to that proposed earlier for the corresponding reactions with (CH3)3NO as the O-atom transfer reagent. The difference of activities between (CH3)3NO and (p-CH3OC6H4)2TeO is discussed in terms of their basicity in this paper.

关 键 词：氧原子转移 动力学 金属羰基化物 

分 类 号：O627[理学—有机化学]