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首页> 外文期刊>Crystal growth & design >Mixed crystals in chiral organic systems: A case study on (R)- and (S)-ethanolammonium 3-chloromandelate
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Mixed crystals in chiral organic systems: A case study on (R)- and (S)-ethanolammonium 3-chloromandelate

机译：手性有机体系中的混合晶体：3-氯扁桃酸（R）-和（S）-乙醇铵的实例研究

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摘要

This work focuses on characterization of chiral organic systems with partial solid solutions. Particularly, behavior of the (R)- and (S)-ethanolammonium 3-chloromandelates (E3ClMA) has been investigated experimentally. Partial solid solutions of the series (R)-E3ClMA-(Rac)-E3ClMA and (S)-E3ClMA-(Rac)-E3ClMA were discovered at the eutectic type of the binary phase diagram by means of systematic differential scanning calorimetry and X-ray powder diffraction measurements. Solubility and metastable zone width were measured for solutions of (R)-E3ClMA, (Rac)-E3ClMA, and their mixtures in ethanol as the solvent. The crystal structure of the pure (R)-E3ClMA was successfully determined by single-crystal X-ray diffraction. Several efforts of single crystals productions from (R, S) solutions were made by means of cooling and evaporation methods. Crystal morphology changes from well-shaped crystals for the pure enantiomer to spherulites for the racemic composition.
机译：这项工作着重于用部分固溶体表征手性有机体系。特别地，已经通过实验研究了（R）-和（S）-乙醇铵3-氯扁桃酸酯（E3ClMA）的行为。 （R）-E3ClMA-（Rac）-E3ClMA和（S）-E3ClMA-（Rac）-E3ClMA系列的部分固溶体通过系统的差示扫描量热法和X-射线粉末衍射测量。测量（R）-E3ClMA，（Rac）-E3ClMA的溶液及其在乙醇中的混合物作为溶剂的溶解度和亚稳区域宽度。通过单晶X射线衍射成功地确定了纯（R）-E3ClMA的晶体结构。 （R，S）溶液通过冷却和蒸发方法进行了单晶生产。晶体形态从纯对映异构体的形状良好的晶体变为外消旋组成的球晶。

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