Bernal Ivan, Watkins Steven
Department of Chemistry, Rutgers University, 73 Warren Street, Newark, NJ 07102, USA.
Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA.
Acta Crystallogr C Struct Chem. 2015 Mar;71(Pt 3):216-21. doi: 10.1107/S2053229615002636. Epub 2015 Feb 20.
The vast majority of racemic solutions of chiral compounds apparently crystallize at room temperature in non-Sohncke space groups as racemic crystals. However, kryptoracemic crystals composed of nearly enantiomeric pairs occasionally crystallize at room temperature, or appear as low-temperature phases, in Sohncke space groups. As a complement to the previously published catalog of organic kryptoracemates [Fábián & Brock (2010). Acta Cryst. B66, 94-103], 1412 chiral organometallic crystal structures have now been extracted from the Cambridge Structural Database and analyzed. 26 are listed herein as credible kryptoracemates. The possible influence of temperature is discussed, together with some problems in characterizing and classifying these structures.
绝大多数手性化合物的外消旋溶液在室温下显然会以非 Sohncke 空间群的形式结晶为外消旋晶体。然而，由近乎对映体对组成的隐外消旋晶体偶尔会在室温下结晶，或者在 Sohncke 空间群中以低温相的形式出现。作为对先前发表的有机隐外消旋体目录[法比安 & 布罗克（2010 年）。《晶体学报》B66，94 - 103]的补充，现已从剑桥结构数据库中提取并分析了 1412 种手性有机金属晶体结构。本文列出了 26 种可信的隐外消旋体。讨论了温度可能产生的影响，以及在表征和分类这些结构时存在的一些问题。
