Association of hydrophobic ions in aqueous solution: A conductometric study of symmetrical tetraalkylammonium cyclohexylsulfamates

Tetraalkylammonium salts of cyclohexylsulfamic acid were used as model systems to study the ion-pairing process of hydrophobic ions. The electric conductivities of aqueous solutions of tetramethyl-, tetraethyl-, tetrapropyl-, tetrabutyl- and tetrapentylammonium salts of cyclohexylsulfamic acid were measured from 278.15 K to 303.15 K (in steps of 5K) in the concentration range similar to 0.2.10(-3)