Phosphorus-containing podands 10. An improved method for synthesizing oligo(ethylene glycol) bis ethers and their complex-forming properties with respect to alkali-metal-cations in anhydrous acetonitrile

Article abstract of DOI:10.1007/BF00698434

An improved preparative method for the synthesis of oligo(ethylene glycol) bis<2-(diphenylphosphinoyl)ethyl> ethers has been developed.The complex-forming ability of these ligands toward alkali-metal cations has been studied by conductometry in anhydrous MeCN at 25 deg C.Ligands of this type have been shown to be highly efficient and selective complexing agents with respect to the Li⁺ cation.The stability series of complexes M⁺L has the form Li > Na > K > Rb in all cases.The complexing properties and selectivity displayed by these new monopodands in MeCN have been compared with those in the THF-CHCl3 (4:1) system studied previously.