Structural Studies on a Lithium Organo-Amidocuprate in the Solid State and in Solution


  • This work was supported by the American Chemical Society Petroleum Research Fund. P. R. Haycock is gratefully acknowledged for his assistance with the 2D NMR spectroscopy.


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Head-to-tail or head-to-head? A lithium amidocuprate complex has been characterized in the solid state and shown to adopt a head-to-tail conformation (see picture). 2D NMR spectroscopic studies show the presence of several structural isomers in solution, including a head-to-head isomer, resulting from Schlenk equilibrium. The presence of these isomers is postulated to have a significant influence on heterocuprate reactivity.