Abstract
Formation of higher ion aggregates mainly by hydrogen bonding in solutions of diethylcyclohexylammonium chloride (c-Hex(Et)2NHCl) has been examined by conductometry in nearly isodielectric mixed solvents: nitrobenzene-acetonitrile (ε≈35) and benzonitrile-ethanol (ε≈25) at 25°C. At lower acetonitrile content (less than ca. 10% by volume) in mixtures with nitrobenzene the salt gave minimum in the molar conductivities Λ over the concentration range 4x10−3 to 0.12 mol-dm−3 which were explained by ion pair (MX), triple ion (M2X, MX2), and quadrupole (M2X2) formation in the solvent mixtures. The formation constants of the ion aggregates decreased with increasing content of acetonitrile. In benzonitrile-ethanol mixtures, the degrees of ion aggregate formation also decreased with increasing content of ethanol; triple ion formation could not be observed at more than 20% ethanol.
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Hojo, M., Moriyama, H. Conductance in isodielectric mixed solvents containing triple ions. J Solution Chem 25, 681–694 (1996). https://doi.org/10.1007/BF00972682
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DOI: https://doi.org/10.1007/BF00972682