【摘要】 在25℃,利用两相滴定法测定了对-叔丁基杯芳烃乙酸tBu[4]CH2COOH和tBu[6]CH2COOH在纯水中的溶解度S和离解常数Ka,氯仿中二聚常数K2和氯仿-水两相之间的分配系数KD。实验测得tBu[4]CH2COOH:S4=(2.03±0.04)×10-4mol/L,Ka,4=(1.50±0.02)×10-5,KD,4=1.55×102和K2,4=3.73×102;tBu[6]CH2COOH:S6=(1.25±0.05)×10-4mol/L,Ka,6=(8.71±0.05)×10-6,KD,6=1.28×102和K2,6=3.88×102。更多还原

【Abstract】 Some basic constants of p-tert-butylcalixarene acetic acid tBu[4]CH2COOH and tBu[6]CH2COOH including solubility(S) in water, dissociation constant(Ka) in aqueous solution, dimerization constant(K2) and distribution constant(KD) between water and chloroform were determined at 25 ℃ by two-phase titration method. The results are as follows: tBu[4]CH2COOH: S4=(2.03±0.04)×10-4 mol/L, Ka,4=(1.50±0.02)×10-5, KD,4=1.55×102 and K2,4=3.73×102. tBu[6]CH2COOH: S6=(1.25±0.05)×10-4 mol/L, Ka,4=(8.71±0.05)×10-6, KD,6=1.28×102 and K2,6=3.88×102.更多还原