摘要
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。
The method of dimensionless parameter of thermostatics for (2-1) type reversible reaction suggested in literatures was used to study the complex reaction of dibenzo-.18-crown-6 with sodium ion in DMSO-H2O mixed solvents (800/200(V/V)) at 25. 0 and 30. 0℃ respectively.The enthalpy change and equilibrium constant of the reaction were directly measured. The applicable range of the method is discussed. The basic requirement for evaluating equilibrium constant Ka with extrapolation is also proposed in this paper.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1990年第11期1263-1267,共5页
Chemical Journal of Chinese Universities
关键词
冠醚
络合反应
无量纲参数法
Thermostatics, Method of dimensionless parameter, Complex reaction, Crown ether, Metal ion
