Bergander, Klaus ; He, Runxi ; Chandrakumar, Narayanan ; Eppers, Oswald ; Günther, Harl (1994) NMR spectroscopy of organolithium compounds, Part XVI Tetrahedron, 50 (20). pp. 5861-5868. ISSN 00404020
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Official URL: http://doi.org/10.1016/S0040-4020(01)90441-7
Related URL: http://dx.doi.org/10.1016/S0040-4020(01)90441-7
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 spectroscopy using the isotopic fingerprint method and 13C,6Li as well as 15N,6Li 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. 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. 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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Ltd |
| Keywords: | Organolithium compounds;aggregation behaviour;6Li NMR;13C NMR |
| ID Code: | 134242 |
| Deposited On: | 05 Jan 2023 11:10 |
| Last Modified: | 05 Jan 2023 11:10 |
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