Solubilities of RbBPh~4 in water, methanol, ethanol, 1-propanol, 1- butanol, 1-pentanol, 1-hexanol, 1-hepanol and 1-octanol at 288.15～ 328.15K have been determined by spectrophotometry. The standard transfer thermodynamic function of RbBPh~4 from water to straight- chain alkanols at 288.15～328.15K has been calculated. The results can be expressed. Furthermore, the contribution of microscopic interaction to thestandard Gibbs energy of transfer of RbBPh~4 was calculated and discussed.

Key words: TETRAPHENYLBORATE, RUBIDIUM COMPOUNDS, THERMODYNAMIC FUNCTION, IONIC MOBILITY, ACTIVITY COEFFICIENT, SOLUBILITY, IONS, ASSOCIATION, FREE ENERGY