Selected topics from recent NMR studies of organolithium compounds

After a short introduction to NMR spectroscopy of alkali and alkaline earth metals the review concentrates on NMR investigations of organolithium compounds. The isotopic fingerprint method, which rests on deuterium-induced isotope shifts for 6Li resonances, is introduced and exemplified with applica...

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Bibliographic Details
Published in:Journal of the Brazilian Chemical Society 1999-08, Vol.10 (4), p.241-262
Main Author: Günther, Harald
Format: Article
Language:English
Subjects:
15N-NMR
6Li-NMR
aggregation
benzyllithium structure
CHEMISTRY, MULTIDISCIPLINARY
isotope shifts
isotopic fingerprints
NMR
organolithium compounds
pi-systems
polylithium systems
pulse methods
reduction
spin-spin coupling
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Description
Summary:After a short introduction to NMR spectroscopy of alkali and alkaline earth metals the review concentrates on NMR investigations of organolithium compounds. The isotopic fingerprint method, which rests on deuterium-induced isotope shifts for 6Li resonances, is introduced and exemplified with applications from the aggregation behavior of cyclopropyllithium systems and mixed aggregate formation between methyllithium and lithium salts. In the following chapter, one- and two-dimensional pulse experiments, both for homo- and for heteronuclear spin systems are discussed. Finally, the structural aspects associated with benzyllithium are outlined and the formation of polylithium systems by lithium reduction of biphenylenes is described.
ISSN:0103-5053
1678-4790
DOI:10.1590/S0103-50531999000400002