NMR-SPECTROSCOPY OF ORGANOLITHIUM COMPOUNDS .16. THE AGGREGATION BEHAVIOR OF BUTYLLITHIUM, PHENYLLITHIUM, AND LITHIUM DIISOPROPYLAMIDE IN DIMETHOXYMETHANE AND DIETHOXYMETHANE

被引：31

作者：

BERGANDER, K ^{[1
]}

HE, RX ^{[1
]}

CHANDRAKUMAR, N ^{[1
]}

EPPERS, O ^{[1
]}

GUNTHER, H ^{[1
]}

机构：

[1] UNIV SIEGEN,D-57068 SIEGEN,GERMANY

来源：

TETRAHEDRON | 1994年 / 50卷 / 20期

关键词：

ORGANOLITHIUM COMPOUNDS; AGGREGATION BEHAVIOR; LI-6; NMR; C-13;

D O I：

10.1016/S0040-4020(01)90441-7

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

The aggregation behaviour of butyllithium (BuLi), phenyllithium (PhLi), and lithium diisopropylamide (LDA) in dimethoxy- and diethoxymethane (methylal and ethylal, respectively) has been studied by NMR spectroscopy using the isotopic fingerprint method and C-13,Li-6 as well as N-15,Li-6 spin-spin coupling constants. In both solvents, LDA exists as a dimer. while BuLi forms a tetramer. PhLi forms a dimer in methylal, whereas two major aggregates exist in ethylal. Due to solvent viscosity at lower temperatures, their structure could not be determined.

引用

页码：5861 / 5868

页数：8

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