UNUSUAL COORDINATION-NUMBER AND GEOMETRY IN A POTASSIUM 18-CROWN-6 COMPLEX

被引：34
作者：
DOXSEE, KM
WIERMAN, HR
WEAKLEY, TJR
机构：
[1] Department of Chemistry, University of Oregon, Eugene
来源：
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 1992年 / 114卷 / 13期
关键词：
D O I：
10.1021/ja00039a031
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Crystallization of 1,4,7,10,13,16-hexaoxacyclooctadecane (18-crown-6) from CHCl3/CH2Cl2 solution in the presence of dipotassium tartrate affords a nine-coordinate potassium complex incorporating chloride rather than tartrate as the counteranion. This complex, [(18-crown-6)K(H2O)3](H3O)(H2O)Cl2, displays an unusual asymmetrical conformation of the crown ether ring. The structure of the complex is discussed and compared with other reported 18-crown-6 complexes of potassium, in which the 18-crown-6 moiety always adopts a much more symmetrical conformation.
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页码：5165 / 5171
页数：7
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