首页> 外文期刊>New Journal of Chemistry >Determination of molar refractions and Abraham descriptors for tris(acetylacetonato)chromium(III), tris(acetylacetonato)iron(III) and tris(acetylacetonato)cobalt(III)
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Determination of molar refractions and Abraham descriptors for tris(acetylacetonato)chromium(III), tris(acetylacetonato)iron(III) and tris(acetylacetonato)cobalt(III)

机译:测定Tris(乙酰丙酮)铬(III),三(乙酰丙酮)铁(III)和Tris(乙酰丙酮)钴(III)的摩尔折射和亚伯拉罕描述符

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摘要

We have determined molar refractions of tris(acetylacetonato) chromium(III), tris(acetylacetonato) iron(III) and tris(acetylacetonato) cobalt(III). Although the d-electron structures of the three metal centres differ significantly, the three molar refractions are actually quite close to each other. We then used these molar refractions to determine the Abraham E-descriptor, we calculated the V-descriptor by McGowan's method, and then used literature data on solubilities and water-solvent partitions to obtain the rest of the set of descriptors for the three tris(acetylacetonato) complexes. If we take E as the average of those for the chromium, iron and cobalt complexes, we can use limited literature data to obtain the full set of Abraham descriptors for the tris(acetylacetonates) of vanadium(III), yttrium(III), samarium(III), lanthanum(III) and neodymium(III). For the eight complexes, the descriptors vary regularly with complex molecular weight. These show that the complexes are quite polarizable, have zero hydrogen-bond acidity and significant hydrogen bond basicity. From the sets of Abraham descriptors, a very large number of physicochemical properties can be predicted for the eight acetonylacetonates.
机译:我们已经确定了Tris(乙酰丙酮)铬(III),Tris(乙酰丙酮)铁(III)和Tris(乙酰丙酮)钴(III)的摩尔折射。虽然三个金属中心的D-电子结构显着差异,但是三个磨牙折射实际上彼此相邻。然后我们使用这些磨牙折射来确定亚伯拉罕电子描述符,我们计算了McGowan的方法的V-描述符,然后使用了对溶解度和水溶剂分区的文献数据来获得三个TRIS的其余描述符(乙酰丙酮酸盐)复合物。如果我们作为铬,铁和钴复合物的平均值,我们可以使用有限的文献数据来获得钒(III),钇(III),钐(III),钐的TRIS(乙酰丙酮)的全套亚伯拉罕描述符(III),镧(III)和钕(III)。对于八个复合物,描述符通常具有复杂的分子量的定期变化。这些表明复合物是非常可极化的,具有零氢键酸度和显着的氢键碱度。从亚伯拉罕描述符的组中,可以预测八个乙酰丙酮酸盐的大量物理化学性质。

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