4.7 Article

MeLi plus LiCl in THF: One Heterodimer and No Tetramers

Journal

JOURNAL OF ORGANIC CHEMISTRY
Volume 75, Issue 17, Pages 5976-5983

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/jo101282m

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Funding

  1. Ministere de La Recherche et de la Technologie

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The structure of the aggregates formed when mixing methyllithium and lithium chloride in THF has been studied by multinuclear magnetic resonance at 170 K. The data suggest that only one new entity is observed, that is the dimer [(MeLi)(LiCl)], in equilibrium (K approximate to 0.6) with [MeLi](4) and [LiCl](2). NMR diffusion measurements lead to the conclusion that this dimer is trisolvated in THF at 170 K, a solvation scheme in agreement with DFT computations.

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