- 作者: 許東明; 張正; 許光玲
- 作者服務機構: Department of Chemistry, National Taiwan University, Taipei, Taiwan
- 中文摘要:
The acid dissociation constant (Ka) of β-isopropyltropolone (IPT or HL) together with the stability constant (K) of its chelate complex with UO..2+ ion have been determined in water-ethanol medium containing 50% ethanol by volume and 0.1M NaClO4 over the temperature range 15-45℃. From these results, values of the free energy, enthalpy and entropy of the chelation have been calculated at 25℃. The results are collected as follows:
Ka (15-45℃) logK ΔG(kcal/mole) ΔH(kcal/mole) ΔS(e.u./mole)
HL 2.24×10¯..+
4.3×10¯10(t-25)
UO2L2 14.36 —19.60 —10.49 30.55 - 英文摘要: --
- 中文關鍵字: --
- 英文關鍵字: --