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정오진,송기둥,김호두,이용두 조선대학교 기초과학연구소 1985 自然科學硏究 Vol.8 No.1
The macrocyclic ligands of the dibenzo-18-crown-S(DBC) was synthesized from pyrocatechol and bis 1.1-dibromo ethane. The determination of stability constant, mole ratio, melting point and structure of solid type land calculation of thermodynamic function (△S, △H) of DBC complexes were investigated. The compound of DBC ligands with nitrate salt of rare earth element was formed 1 : 1 complexes as mole ratio in N, N-dimethyformamide. From those results, it was found that stability constant of the complexes with affects on the kind of anions. The stability constant and melting point of these complexes formed were 4.95 and 298℃ respectively.