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Citation: Chen Rongti*, Deng Guocai, Jiang Qi, Mu Ruicai. EQUILIBRIUM AND KINETIC STUDY ON THE LIGAND EXCHANGE REACTION BETWEEN N,N-DIsUBSTITUTED DITHIOCARBAMATE CHELATES OF NICKEL(Ⅱ) BY MEANS OF HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY[J]. Acta Physico-Chimica Sinica, ;1989, 5(05): 626-629. doi: 10.3866/PKU.WHXB19890524 shu

EQUILIBRIUM AND KINETIC STUDY ON THE LIGAND EXCHANGE REACTION BETWEEN N,N-DIsUBSTITUTED DITHIOCARBAMATE CHELATES OF NICKEL(Ⅱ) BY MEANS OF HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY

1.
Department of Chemistry; Nankai University; Tianjin

Received Date: 30 January 1988
Available Online: 15 October 1989

In this article, equilibrium and kinetics of the ligand exchange reaction between a series of N,N-disubstituted dithiocarhamate chelates of Nickel (Ⅱ)
have been studied by means of high-performance liquid chromatography in various solvents such as chloroform, dichloromethane, methylbenzene, ethyl acetate and DMF (dimethyl formamide) etc. at 30 ℃. The activation parameters of two selected reactions with different disubstituted alkyl groups have been determined in toluene. The experimental results indicate that steric effect of the alkyl groups may influence to some extent the rate of ligand exchange. The reactions of ligand exchange conform to an S_N2 mechanism. Statistical factor seems to enter the evaluation of the equilibrium constants. Solvation effect may contribute to the influence of solvents on reaction rate.
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