||Emsley, J. (1980). "Very Strong Hydrogen Bonding". Chemical Society Reviews 9: 91–124. doi:10.1039/CS9800900091 p.101 Table 5
||S. A. Harrell and D. H. McDaniel, Strong Hydrogen Bonds. II. The Hydrogen Difluoride Ion, J. Amer. Chem. SOC., 1964, 86, 4497. DOI: 10.1021/ja01074a061
||"Waddington was the first to tackle this thorny problem (of strength of H-F bond, ref 31) and suggested the
seemingly high value of ca. 240 kJ mol^-1, which was beyond the upper limit of a
possible range of 113-230 kJ mol^-1 that Ketelaar had suggested as likely many
years before. A minimum value of 155 kJ mol^-1 was deduced from the ?H
of reaction: Me4NF(s)+HF(g)?Me4NHF2(s)(primary source). It was reasoned that lattice expansion from Me4NF to Me4NHF2 would be slight and the difference in lattice energies could be ignored, so that the ?H of 155 kJ mol^-1 did represent a likely value for the hydrogen-bond energy."
||Ron Milo - Admin