کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
204225 460708 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Identification and characterization of an anomalous racemate
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Identification and characterization of an anomalous racemate
چکیده انگلیسی

Direct crystallization is a convenient and generally efficient method to increase the optical purity of partially resolved enantiomers. The design of chiral purification processes based on crystallization requires measurement of solubility of all stable phases, i.e. enantiomers and racemic mixtures, in the process solvent. Enantiomeric systems have been classified by the nature of the solid phases formed as racemic compounds, conglomerates or solid solutions. In rare cases, however, enantiomers form crystalline addition compounds with a stoichiometry other than 1(S):1(R). These structures are generally known as “anomalous racemates”. The solubility and melting point diagrams of each type of enantiomeric system exhibit characteristic features which have significant implications on the efficiency of the crystallization to enhance optical purity. In this study, we report the formation of a non-equimolar 3:1 addition compound in the R/S 3-hydroxy-4-(2,4,5-trifluorophenyl) butanoic acid.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fluid Phase Equilibria - Volume 258, Issue 2, 15 September 2007, Pages 140–147
نویسندگان
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