Kinetics And Mechanism Of Oxidation Of Alcohol,Amine And Hydramine By Ag(?) Complex

Through consulting the literature,we kown the preparation method of Ag???and the application of it in different fields,because the higher oxidation state of Ag???,so it not only the commonly material in organic synthesis and chemical analysis,but also can act as a sterilant in our daily life.In this experiment,Ditelluratoargentate???as oxidizing agent.allyl alcohol,methallyl alcohol,diethylene glycol,cyclopropylamine,cyclopentylamine,N-methyldiethanolamine,N,N-dimethylethanolamine were selected as reducing agents,The kinetic of oxidation of organics by Ag???in alkaline medium had been studied by spectrophotomety.we record the k_obsbs through change the temperature of the reaction,the concentration of reductant agent,tannic acid and hydroxide concentration,ionic strength and other different reaction conditions affect the reaction rate,thus basing the reaction results,we design the reaction mechanism.according to the experimental data results,the reaction showed first order with respect to Ag???and also to allyl alcohol,methallyl alcohol,diethylene glycol and cyclopentylamine.However,the reaction in cyclopropylamine,N-methyldiethanolamine and N,N-dimethylethanolamine is fractional order.The k_obsbs in proportion to the concentration of reductant and k_obsbs is inversely proportional to[H₄TeO₆^2-].With the increase of[OH^-],the k_obsbs has different variation rules,some appear to increase and some appear to decrease.In addition,the ionic strength exhibits a negative salt effect on the k_obsbs to the reaction.Finally,according to the reaction mechanism,the rate constants and various activation parameters for the rate control at different temperatures are calculated,The lower the activation energy E_a,the faster the reaction,but this is not absolute,because the rate of the reaction is also related to the activation entropy?S^?,and the activation energy E_a has a greater influence on the rate of k,and the reactivity of the amino group is higher than that of the hydroxyl group,which is related to the electrons on the N atom.thus we can explain the experimental phenomena clearly.Through the study of the oxidation reaction of dicationic silver???complex ions,we have a deeper understanding of the chemical reaction kinetics,and it also provides more theoretical guidance for the application of trivalent silver ions.