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Preferential Solvation of the Sodium Cation in Binary Mixtures of Tetrahydrofuran with Unidentate Nitrogen Ligands
Author(s) -
Delville Alfred,
Detellier Christian,
Gerstmans André,
Laszlo Pierre
Publication year - 1981
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19810640218
Subject(s) - chemistry , tetrahydrofuran , solvation , isopropylamine , pyridine , inorganic chemistry , sodium , solvent , amine gas treating , aniline , equilibrium constant , dissociation constant , piperidine , medicinal chemistry , organic chemistry , biochemistry , receptor
23 Na‐chemical shifts for the NaClO 4 solute depend markedly upon the composition of binary solvent mixtures of THF with amines (pyridine, piperidine, pyrrolidine, aniline, propylamine, and isopropylamine). These changes, analyzed in a novel application of the Hill formalism, show equality of the intrinsic equilibrium constant K for the successive steps, upon displacement of THF from sodium coordination by one of these amines. The results, which are entirely consistent with tetracoordination of the sodium cation by these solvents, also indicate proportionality of the K values to the amine chemical shifts.