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

Authors
BERGANDER K HE RX CHANDRAKUMAR N EPPERS O GUNTHER H
Citation
K. Bergander et al., NMR-SPECTROSCOPY OF ORGANOLITHIUM COMPOUNDS .16. THE AGGREGATION BEHAVIOR OF BUTYLLITHIUM, PHENYLLITHIUM, AND LITHIUM DIISOPROPYLAMIDE IN DIMETHOXYMETHANE AND DIETHOXYMETHANE, Tetrahedron, 50(20), 1994, pp. 5861-5868
Citations number
39
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Tetrahedron → ACNP
ISSN journal
00404020
Volume
50
Issue
20
Year of publication
1994
Pages
5861 - 5868
Database
ISI
SICI code
0040-4020(1994)50:20<5861:NOOC.T>2.0.ZU;2-P
Abstract
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 spectros copy 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 viscosit y at lower temperatures, their structure could not be determined.