Interactions of organozinc compounds with crown ethers and cryptands:: Formation of R2Zn(18-crown-6) rotaxanes

被引：26

作者：

Fabicon, RM

Parvez, M ^{[1
]}

Richey, HG

机构：

[1] Univ Calgary, Dept Chem, Calgary, AB T2N 1N4, Canada

[2] Penn State Univ, Dept Chem, University Pk, PA 16802 USA

来源：

ORGANOMETALLICS | 1999年 / 18卷 / 24期

关键词：

D O I：

10.1021/om990468e

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Several pieces of evidence indicate that R2Zn(18-crown-6) rotaxanes are components of solutions prepared from some R2Zn (R = alkyl or aryl) compounds and 18-crown-6, and crystal structures show that Et2Zn(18-crown-6) and Ph2Zn(18-crown-6) solids that precipitate from such solutions have rotaxane structures. By contrast, the R2Zn compounds do not form rotaxanes with 15-crown-5 or its nitrogen equivalent, 1,4,7,10,13-pentamethyl-1,4,7,10,13-pentaazacyclopentadecane. Disproportionation of R2Zn by macrocycles to form coordinated RZn+ cations and R3Zn- anions is less favorable than the corresponding reaction with R2Mg, although Tol(2)Zn (Tol = p-methylphenyl) and 2,1,1-cryptand do form TolZn(2,1,1-cryptand)(+)Tol(3)Zn(-).

引用

页码：5163 / 5169

页数：7