Herein are reported the crystal and molecular structures of the pridinol mesylate salt (C20H25NO+·CH3O3S−) (I) and its monohydrated solvate form (C20H25NO+·CH3O3S−·H2O) (II). A comparison of both with the already reported structure of pure prid...
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https://www.riss.kr/link?id=O116336432
2018년
-
2052-5192
2052-5206
SCI;SCIE
학술저널
304-310 [※수록면이 p5 이하이면, Review, Columns, Editor's Note, Abstract 등일 경우가 있습니다.]
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
Herein are reported the crystal and molecular structures of the pridinol mesylate salt (C20H25NO+·CH3O3S−) (I) and its monohydrated solvate form (C20H25NO+·CH3O3S−·H2O) (II). A comparison of both with the already reported structure of pure prid...
Herein are reported the crystal and molecular structures of the pridinol mesylate salt (C20H25NO+·CH3O3S−) (I) and its monohydrated solvate form (C20H25NO+·CH3O3S−·H2O) (II). A comparison of both with the already reported structure of pure pridinol [1,1‐diphenyl‐3‐piperidino‐1‐propanol, C20H25NO; 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.
The dehydration of the monohydrate salt of pridinol mesylate is strongly dependent on the heating rate, slow rates leading to a solid–solid process, intermediate rates to coexistence with the hydrate and faster heating to complete melting, without generation of the anhydrous solid in the water‐loss process.
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