金鸡宁钴配合物:两种晶体修饰中的分子间相互作用。

Enantiomer Pub Date : 2002-11-01 DOI:10.1080/10242430215706
Agnieszka Skórska, Barbara J Oleksyn, Jan Sliwiński
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引用次数: 5

摘要

用CoCl3 × 6H2O与金鸡宁的饱和醇溶液混合,得到了两种金鸡宁钴配合物C19H23Cl3CoN2O的结晶改性。x射线结构分析表明,一种修饰的不对称单元CoCn1只含有两性离子分子。在另一种化合物CoCn2的不对称单元中,有两个标题化合物分子和两个乙醇分子。通过比较钴配合物与类似的奎宁配合物和金鸡宁锌配合物的晶体结构和分子结构,确定了绝对构型、CoCl3与喹啉的配位以及醇分子的存在对所研究结构的影响。在这两种结构中,主要的相互作用是分子间的氢键。它们根据醇分子的存在形成特征环系统。环状特征也与生物碱的绝对构型有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Cobalt complex of cinchonine: intermolecular interactions in two crystalline modifications.

Two crystalline modifications of cinchonine cobalt complex, C19H23Cl3CoN2O, were obtained from mixture of saturated alcohol solutions of CoCl3 x 6H2O and cinchonine. The X-ray structure analysis revealed that the asymmetric unit of one modification, CoCn1, contains only zwitterionic molecules of the complex. In the asymmetric unit of the other, CoCn2, there are two molecules of the title compound and two molecules of ethanol. The influence of the absolute configuration, the CoCl3 coordination with quinoline, and the presence of alcohol molecules on the studied structures was established by comparison of the crystal and molecular structures of both cobalt complexes with the analogous quinine complex and zinc complex of cinchonine. The interactions that dominate in the packing of the molecules in both structures are intermolecular hydrogen bonds. They form characteristic ring systems, depending on the presence of the alcohol molecules. The ring features are also related to the absolute configuration of the alkaloid.

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