Thermodynamic Properties of Transfer for Tetraphenylarsonium Tetraphylborate from Water to n-Alkanols

Solubilities of tetraphenylarsonium tetraphenylborate (Ph₄AsB-Ph₄) in water, methanol, ethanol, 1-propanol, 1-butanol, 1-pentanol, 1-hexanol and 1-octanol at T = 293.2, 298.2, 303.2 and 308.2 K have been determined by spectrophotometry. The standard transfer Gibbs energy (Δ_tr-G⁰_w-s) and entropy (Δ_tr-G⁰_w-s) of Ph₄AsBPh₄ from water to the n-alkanols at temerature from 293.2 K to 308.2 K have been obtained. Furthermore, the contribution of microscopic interaction to the standard Gibbs energy of transfer for Ph₄AsBPh₄ was calculated and discussed. The results show that the effect of hydrophobic interaction of Ph₄AsBPh₄ on its transfer process is the most important factor. According to the thermodynamical principle, the transfer process of Ph₄AsBPh₄ from water to the n-alkanols is the entropy dominated.