ELECTROCHEMICAL GENERATION OF STABLE CARBOCATION-TETRAFLUOROBORATE SALTS AND THE CATION-ANION INTERACTIONS IN THEIR SOLID-STATE STRUCTURES

被引：7

作者：

BECKER, JY

SHAKKOUR, E

SHIMONI, L

机构：

[1] Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva

来源：

STRUCTURAL CHEMISTRY | 1993年 / 4卷 / 02期

关键词：

CARBOCATION; TETRAFLUOROBORATE SALT; MULTIANNULATION PROCESS; KETENE IMINES; ELECTROCHEMICAL OXIDATION;

D O I：

10.1007/BF00677369

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The electrochemical generation of stable carbocations, among other heterocyclic products, by a unique electrochemical process involving the anodic oxidation of aryl-substituted ketene imines is described. The electrochemical oxidation undergoes an unusual multiannulation process to form these types of products by intermolecular cyclization. The X-ray crystal structures of two carbocation tetrafluoroborate salts, 4c and 4d, of which the latter is solvated by CH2Cl2, are presented. We have observed that one of the B-F bonds in 4c is relatively long with respect to the other three similar in length B-F bonds. while in the solvated salt (4d.CH2Cl2), one of the B-F bonds is particularly short relative to its congeners. In both cases, the ''exceptional'' B-F bonds are oriented toward the positive center of the carbocation. These phenomena are compared with other known X-ray structures of organic tetrafluoroborate salts and discussed.

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页码：85 / 89

页数：5

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