An NMR study of 2-ethyl-1-butyllithium and of 2-ethyl-1-butyllithium/lithium 2-ethyl-1-butoxide mixed aggregates

A 1H, 13C, and 6Li NMR study of 2-ethyl-1-butyllithium indicated that 2-ethyl-1-butyllithium exists only as a hexameric aggregate over the entire temperature range of 25 to - 92.1 ° C in cyclopentane. Reacting 2-ethyl-1-butyllithium with 2-ethyl-1-butanol resulted in alkyllithium/lithium alkoxide mixed aggregates, apparently of the form Ra(RO)bLia+b. A multinuclear, variable temperature NMR study of samples with O:Li ratios of 0.2 and 0.4 showed, in addition to the alkyllithium, the formation of four mixed aggregates, one of them probably an octamer. Higher O:Li ratio samples showed the formation of several other mixed aggregates. Mixing 2-ethyl-1-butyllithium with independently prepared lithium 2-ethyl-1-butoxide formed the same mixed aggregates formed by in situ synthesis of lithium alkoxide. Lithium 2-ethyl-1-butoxide also exists as aggregates in cyclopentane.

Grantor dc:publisher

University of North Texas

Year dc:date

2001

Author dc:creator

• Ferreira, Aluisio V. C.

Contributors dc:contributor

• Thomas, Ruthanne D.
• Desiderato, Robert

• Organolithium compounds.
• Nuclear magnetic resonance spectroscopy.
• alkyllithium
• lithium
• alkoxide
• mixed aggregates
• NMR

Statement dc:rights

• Public
• Copyright
• Ferreira, Aluisio V. C.
• Copyright is held by the author, unless otherwise noted. All rights reserved.

Language dc:language

English

Identifier

oclc: 47833666
https://digital.library.unt.edu/ark:/67531/metadc2807/
ark: ark:/67531/metadc2807

OAI identifier oai:identifier

info:ark/67531/metadc2807