Infrared Absorption Spectra of Aqueous HF2mdash;, DF2mdash;, and HF

摘要

Strong infrared absorption bands of KHF2appear at 1233 cmmdash;1and 1473 cmmdash;1in the solid, and are observed at 1206 cmmdash;1and 1536 cmmdash;1respectively, in H2O solution. Corresponding values for KDF2are 888 cmmdash;1and 1045 cmmdash;1in the solid, and 873 cmmdash;1and 1102 cmmdash;1in D2O solution. In saturated KHF2and in KHF2solutions containing excess HF, there appear new, broad absorption bands attributed to polymeric species, e.g., H2F3mdash;. The HF2mdash;ion is observed in concentrated aqueous HF; in addition, there is a strong absorption at 1820 cmmdash;1which is not shifted in D2Ohyphen;HF mixtures.