The heats of dissociation, ΔH, were determined for the reaction: M(Ox)n·HOx(s) → M(Ox)n(s) + HOx(g) for the uranium (VI), thorium (IV), and scandium (III) complexes of 8-quinolinol (HOx) and substituted 8-quinolinols such as 2-methyl-, 5,7-dichloro-, 5,7-dibromo-, 5-iodo, and 5-iodo-7-chloro-8-quinolinol. Also, the heats of sublimation, ΔHv, were determined for the above chelating agents in the temperature
确定了反应的解离热ΔH:
铀(VI),th(IV)和M(Ox)n ·HOx(s)→M(Ox)n(s)+ HOx(g)
8-喹啉醇(HOx)与取代的
8-喹啉醇(例如
2-甲基-,5,7-二
氯-,5,7-二
溴-,5-
碘和5-
碘-7-
氯)的(III)配合物-
8-喹啉醇。此外,升华,预赛ΔH v,被上述的温度范围内的35°
螯合剂至160℃确定为。这些量以及K p,ΔF和ΔS从通过改进的克努森渗出池方法获得的解离压力数据计算出这些值。对于8-
喹啉金属螯合物,递减ΔH值的顺序为:UO 2 2+ > Th 4+ > Sc 3+。对于给定的
金属离子Th 4+,ΔH值递减的顺序为:HOcCl 2 > HOx> HOxICl> HOxBr 2 > HOxI。