【Abstract】 The solid complex of lithium perchlorate with 4 tert butylbenzo 15 crown 5（4 t BB15C5） has been prepared in iodobenzene. The composition of the solid was determined as Li（4 t BB15C5）ClO 4 and its melting point was 119₁21 ℃. The far IR shift of the complex is obvious. The far IR absorption band of the complex containing 100% 6Li can be found by extrapolation, resolving the difficulty in obtaining a sample of 100% 6Li up to now. A relative reduced partition function ratio, [（ s/s′）f ] org , being 1.045 is calculated. Since the [ （s/s′）f ] aq of lithium perchlorate in solid state had been obtained as 1.025 and may act as that in aqueous phase, the phase equilibrium separation factor α may be obtained as 1.019 by the quotient of 1.045/1.025 for the extractive system of （4 t BB15C5） C 6H 5I/LiClO 4 H 2O. The value of α is just equal to the value of intrinsic separation factor （1+ ε p） described previously. [WT5HZ]更多还原