三醋酸铀酰锂、钠、钾、铷和铯的合成及物理化学性质的研究

PREPARATION OF Li, Na, K, Rb, Cs SALTS OF URANYL TRIACETATES AW DETERMINATION OF THEIR PHYSICAL-CHEMICAL PROPERTIES

摘要: 本文合成了三醋酸铀酰锂、钠、钾、铷和铯。锂络合物带两个结晶水,其余为无水络合物。测定了它们的比重、介电常数、折光率和在水中的溶解度。计算了它们的克分子极化度、克分子折射度和离子化程度。研究了这些络合物极化度对溶解度的影响,它们的变化规律是按钠、钾、铷和铯络合物依次增加,带两个结晶水的锂络合物有较高的极化度,因此它的溶解度也较高。

Abstract: The complexes LiUO2Ac3 2H2Q, NaUO2Ac3, KUQ2AC3, RbUO2Ac,, CsUO2Ac3 were prepared. Their crystal forms, densities(d), dielectric constants(ε), refraction indices(n), solubilities(s) have been determined and their molar polarizations(P) and molar refractivities (R) have been calculated. Their molar polarizations, molar refractivities and solubilities increase with the ionic radius of alkali metals, except LiUO2Ac3 2H2O, which is the most polar, refractive and soluble of the five complexes, because of its two water molecules.