NMR spectroscopy of organolithium compounds. XXVI--The aggregation behaviour of methyllithium in the presence of LiBr and LiI in diethyl ether and tetrahydrofuran

NMR spectroscopy of organolithium compounds. XXVI--The aggregation behaviour of methyllithium in the presence of LiBr and LiI in diethyl ether and tetrahydrofuran

2004 John Wiley & Sons, Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Magnetic resonance in chemistry : MRC. - 1985. - 42(2004), 9 vom: 15. Sept., Seite 788-94
1. Verfasser: Fox, Thomas (VerfasserIn)
Weitere Verfasser: Hausmann, Heike, Günther, Harald
Format: Aufsatz
Sprache:English
Veröffentlicht: 2004
Zugriff auf das übergeordnete Werk:Magnetic resonance in chemistry : MRC
Schlagworte:Comparative Study Journal Article Research Support, Non-U.S. Gov't Bromides Carbon Isotopes Furans Iodides Isotopes Lithium Compounds Organic Chemicals mehr... Protons Solvents Ether 0F5N573A2Y tetrahydrofuran 3N8FZZ6PY4 lithium bromide 864G646I84 Lithium 9FN79X2M3F
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520 |a 1H, 6Li and 13C NMR spectroscopy were used to determine the structure of aggregates formed in mixtures of methyllithium, H3CLi, and lithium bromide and iodide in diethyl ether and tetrahydrofuran. From the chemical shifts, the signal intensity distribution and the isotope shifts observed for partially deuterated systems, it was shown that generally tetrameric structures with different halogen contents dominate. For methyllithium-lithium bromide (1:1) in THF a considerable concentration of an H3CLi-LiBr dimer was found. For the first time, deuterium-induced 6Li isotope shifts over four bonds were observed 
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