Effect of HMPA on the Composition of Organocyanocuprates. First Observation of a ~2J~13C-~13CN Coupling Constant in a Vinylcyanocuprate

摘要

Variable temperature ~1H-and ~13C-NMR spectroscopic analysis of THF and THF-HMPA solutions of stannylcyanocuprates, as well as their addition products to 1-alkynyl ethers have been conducted. When prepared in the presence of HMPA, the reagents and addition products formed exist as mixtures in which some free lithium cyanide is present and the remaining cyanide is otherwise complexed.