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Crystallochemical Correlate to the Anomaly of Hydrofluoric Acid
Author(s) -
Mootz Dietrich
Publication year - 1981
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198107911
Subject(s) - oxonium ion , hydrofluoric acid , chemistry , crystallography , ion , inorganic chemistry , organic chemistry
Why does dilute hydrofluoric acid–in contrast to the other hydrohalic acids–exhibit low acid strength? A recent explanation is based on the particularly strong H‐bonds, indicated by IR spectroscopy, in the ion‐pair H 3 O + · F − . This explanation now correlates results from X‐ray structure analyses: the compounds H 2 O · HF, H 2 O · 2HF, and H 2 O · 4HF, which melt between −36 and −100°C, are oxonium salts with very strong H‐bridges.