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Systematic data set for structure-property investigations: Solubility and solid-state structure of alkaline earth metal salts of benzoates

机译:用于结构性质研究的系统数据集:苯甲酸盐的碱土金属盐的溶解度和固态结构

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摘要

A new resource for studying structure property relationships is presented, namely a systematic database of 36 organic salt structures together with phase specific aqueous solubility data. The salts are derived from four M~(2+) cations (Mg~(2+), Ca~(2+), Sr~(2+), Ba~(2+)) and nine substituted benzoate anions. The intrinsic solubility of the free acid is found to have a major contribution to make to salt solubility, but despite previous literature assertions, there appears to be little correlation of solubility with the polarity of the organic ions, with cation size, or with hydration state. Importantly, we also show that consideration of the array structure rather than just molecular considerations improves prediction of rank orders of solubility. Thus, three-dimensional intermolecular networks (here formed with hydrogen bonding, M-O-M and M-N-M interactions, and halide interactions) are found to have lower aqueous solubilities than lower dimensional networks.
机译:提出了一种研究结构性质关系的新资源,即36种有机盐结构的系统数据库以及特定相的水溶性数据。这些盐衍生自四个M〜(2+)阳离子(Mg〜(2 +),Ca〜(2 +),Sr〜(2 +),Ba〜(2+))和九个取代的苯甲酸酯阴离子。发现游离酸的固有溶解度对盐的溶解度起主要作用,但是尽管有先前的文献断言,溶解度与有机离子的极性,阳离子大小或水合状态似乎几乎没有相关性。 。重要的是,我们还表明,考虑阵列结构而不只是分子考虑因素,可以改善对溶解度等级的预测。因此,发现三维分子间网络(在此通过氢键,M-O-M和M-N-M相互作用以及卤化物相互作用形成)具有比较低维网络更低的水溶性。

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