...
首页> 外文期刊>Acta Crystallographica, Section B. Structural science, crystal engineering and materials >A crystallographic and thermal study of pridinol mesylate and its monohydrated solvate
【24h】

A crystallographic and thermal study of pridinol mesylate and its monohydrated solvate

机译:甲癸酰甲磺酸酯的晶体和热研究及其一水合物溶剂化物

获取原文
获取原文并翻译 | 示例
           

摘要

Herein are reported the crystal and molecular structures of the pridinol mesylate salt (C_(20)H_(25)NO~+·CH_3O_3S~-) (I) and its monohydrated solvate form (C_(20)H_(25)NO~+·CH_3O_3S~-·H_2O) (II). A comparison of both with the already reported structure of pure pridinol [1,1-diphenyl-3-piperidino-1-propanol, C_(20)H_(25)NO; Tacke et al. (1980). Chem. Ber. 113, 1962-1980] is made. Molecular structures (I) and (II) are alike in bond distances and bond angles, but differ in their spatial conformation, and, more relevant still, in their hydrogen-bonding motifs. This gives rise to quite different packing schemes, in the form of simple dimers in (I) but water-mediated hydrogen-bonded chains in (II). The dehydration behaviour of form (II) is highly dependent on the heating rate, with slow rates leading to a clear endothermic dehydration step, towards anhydrous (I), with subsequent melting of this latter phase. Increased heating rates result in a more unclear behaviour ending in a structural collapse (melting of the hydrated phase), at temperatures significantly lower than the melting point of the anhydrous phase. The eventual relevance of the water link in the structure of (II) is discussed in regard to this behaviour.
机译:据报道,丙丁醇甲板盐的晶体和分子结构(C_(20)H_(25)不〜+·CH_3O_3S〜 - )(I)及其一水溶液溶剂化物形式(C_(20)H_(25)不〜+ ·CH_3O_3S〜 - ·H_2O)(II)。与已经报道的纯丙丁醇的结构进行比较[1,1-二苯基-3-哌啶-1-丙醇,C_(20)H_(25)NO; Tacke等人。 (1980)。化学。 BER。 113,1962-1980]制作。分子结构(i)和(ii)在粘合距离和粘合角度中是相似的,但在其空间构象中不同,并且在其氢键基序列中仍然更相关。这引起了(i)中的简单二聚体的形式产生了相当不同的包装方案,但在(II)中的水介导的氢键链。形式(II)的脱水行为高度依赖于加热速率,缓慢的速率导致透明的吸热脱水步骤,朝向无水(I),随后的后阶段熔化。增加的加热速率导致在结构塌陷(水合相熔化)的更不明确的行为中,温度明显低于无水相的熔点。关于这种行为讨论了(ii)结构中的水链路的最终相关性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号