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本文应用可逆反应的热静力学无量纲参数法,研究了二苯并-18-冠-6与金属钠离子在“800/200(V/V)”DMSO-H_2O混合溶剂中的络合反应。直接测定了反应的焓变和平衡常数,讨论了这种方法的适用范围,建立了测定平衡常数的相对误差表示式并提出了用外推法求K_(?)的基本要求。
In this paper, the thermostability dimensionless parameter method of reversible reaction was used to study the complexation of dibenzo-18-crown-6 and sodium metal ions in a mixed solvent of “800/200 (V / V)” DMSO-H_2O. The enthalpy and equilibrium constants of the reaction were directly determined. The applicable range of this method was discussed. The relative error expression for the determination of the equilibrium constant was established and the basic requirement of extrapolating K_ (?) Was proposed.