CONDUCTANCE OF TETRAALKYLAMMONIUM SALTS IN 2-BUTANONE FROM -45-DEGREES-C TO 25-DEGREES-C

Interactions of three types of tetraalkylammonium cations (tetrapropyl -, tetrabutyl- and tri-isoamylbutyl- ammonium) with perchlorate and te traphenylborate anions were studied by the conductivity method in 2-bu tanone from -45-degrees-C to 25-degrees-C. Conductance data obtained f or diluted solutions (5x10(-5) - 2x10(-3) mol-dm-3) were used to calcu late the limiting molar conductivities and association constants. The conductance equation of Fuoss-Hsia including the Chen term and the che mical model assumption were applied. Limiting ion conductivities were calculated assuming equal limiting conductivities of the i-Am3BuN+ and BPh4- ions at all temperatures. Gibbs energies and entropies of ion p air formation, calculated from the dependence of association constants on temperature, are presented including the contributions due to shor t-range forces.