Variation of fluoride ion solvation and pF− buffer properties of HF2−/HF and HF/H+ pairs in acetonitrile-water mixtures

✍ Scribed by J. Bessiere; F. Bazine

• Book ID: 104150883
• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 510 KB
• Volume: 44
• Category: Article
• ISSN: 0022-1139
• DOI: 10.1016/s0022-1139(00)84370-5

✦ Synopsis

The F-ion is weakly solvated in acetonitrile-water mixtures. In the mixture with 50% (mole) of water, the fluoride ion solvation transfer activity coefficient is logi = 5.1; it increases up to 16.7 in anhydrous acetonitrile. In these two mixtures, the equimolar buffer HF/H+ imposes pF-values of 6.4 and 16.8 respectively and the HFz-/HF buffer system imposes pF-values of 2.6 and 5.8. Variations of the solvation of HFz-, HF and H+ species as a function of the water content of the mixtures are also determined.