用量热滴定法于298.15K测定了除钪、钷以外的全部十五种稀土(Ⅲ)高氯酸盐与苯并-15-冠-5在乙腈溶液中的配位作用.借助计算机算出了配合物的稳定常数和配位焓,进而算出了配位自由能和配位熵.结果表明:十五种稀土(Ⅲ)离子与苯并-15-冠-5都可以配位,配位焓为正值;La~(3+)配合物最稳定,Ce~(3+)次之,其余稀土(Ⅲ)离子配合物的稳定性变小,但彼此差别不大,在Tb处有突变;熵在配合物形成时起稳定化作用. The results showed that all the fifteen rare earth (Ⅲ) perchlorates except scandium and chrysene were coordinated with benzo-15-crown-5 in acetonitrile at 298.15K, The stable constants and the enthalpies of the complexes were calculated, and the coordination energies and the coordination entropies were calculated. The results showed that all fifteen rare earth ions could coordinate with benzo-15-crown-5, (3+), the stability of other rare earth (Ⅲ) ion complexes becomes smaller, but the difference between them is not large, and there is a mutation in Tb; entropy Stabilization in the complex formation.