Solvating properties of certain polymeric ethers

The formation of two kinds of solvation complex of poly(ethylene oxide), polydimethoxyethylene, and polydioxene with some alkali derivatives of fluorene in dioxane was found, differing in the ionic species of the fluorenyl metal in the complex. Additional evidence was found for the existence of peripherally solvated ion pairs of fluorenyllithium, ‐sodium, and ‐potassium. It was shown that polydimethoxyethylene and polydioxane interact with different cations in a different manner. The complexing ability of poly(ethylene oxide) and polydioxane with respect to fluorenyllithium, ‐sodium, and ‐potassium, and of polydimethoxyethylene for fluorenyllithium, was proved to be stronger than that of their monomer analogs—dimethoxyethane and dioxane. This was explained by the effect of the polymer chain.