Abstract:
Conductance measurements have been carried out at 25°C on the following systems: tctrabutyland
tetrahexyl-ammonium perchlorates in methanol 4- dioxan mixtures, and tetrabutylammonium
perchlorate in acetonitrile4- dioxan and acetonitrile 4- carbon tetrachloride mixtures. The analysis of
the association behaviour of these electrolytes in methanol 4- dioxan, in pure methanol and in water,
shows that only in aqueous solutions does the association increase with increasing alkyl chain length.
This experimental evidence can be rationalized, qualitatively, on the basis of two different mechanisms
of association: ion-pairing due to Diamond mechanism and to electrostatic interactions.
