NMR,PGSE Diffusion,and X-ray Diffraction Studies of Lithium and Potassium Salts Derived from Diphenylphosphino(omicron-cyanophenyl)aniline and Their Crown Ether Complexes

摘要

~(-1)H,~(31)P,and ~7Li pulsed-gradient spin-echo(PGSE)diffusion and variable-temperature NMR results for THF solutions of the lithium and potassium salts derived from diphenylphosphino(omicron-cyanophenyl)aniline are reported and compared to the solid-state results obtained via X-ray diffraction studies.The solution results favor mononuclear salts,sometimes strongly ion paired,whereas the solid-state data reveal dinuclear species.The structures of the products from reactions of these salts with crown ethers are determined via PGSE and ~(-1)H Overhauser NMR methods.