Brown's bond valences, a measure of the strength of hydrogen bonds

Limitations of potentiometric studies to determine the surface charge of gibbsite γ-Al(OH)3 particles

“…Indeed, O-H stretching frequencies are directly linked to the force (or the length) of vibrating bonds. Several studies have proposed empirical laws to link the stretching O-H frequencies to bond length [17][18][19]. In particular, Lutz et al established an empirical law that correlated harmonic O-D stretching frequencies to bond length and bond valence [19].…”

“…Several studies have proposed empirical laws to link the stretching O-H frequencies to bond length [17][18][19]. In particular, Lutz et al established an empirical law that correlated harmonic O-D stretching frequencies to bond length and bond valence [19]. In the case of our gibbsite sample the harmonic O-D stretching wave numbers are located between 2506.5 and 2667.5 cm −1 (2565 cm −1 for OD surface groups, corresponding to the 3460 cm −1 OH stretching mode), which corresponds to bond lengths in the range 0.955-0.967 Å and a bond valence close to 0.9 [15,16].…”

Hydrous Phases and Hydrogen Bonding at High Pressure

“…Unfortunately, systematic and model-dependent errors, such as are introduced by thermal motion and static disorder, limit the accuracy of the experimentally available intramolecular O-H(D) distances. This problem with estimating the strength of hydrogen bonds in solid hydroxides and hydrates has recently been addressed and summarized in papers by Lutz and co-workers (Beckenkamp and Lutz 1992, Lutz et al 1994, Lutz 1995, Lutz et al 1995b, Lutz and Jung 1997 and by Brown (1995). Although the stretching modes υ OH and υ OD are the most reliable measure of the strength of hydrogen bonds, the presence or absence of hydrogen bonds can be ascertained from the H(D)...X distances and the OH or OD stretching frequencies υ(OD).…”

Die Zwillings-Kristallstruktur von Mg(BrO3)2 · 6H2O / The Crystal Structure of Twinned Mg(BrO3)2 · 6H2O

“…Leider gilt dies zumindest z. T. auch für Neutronenbeugungsdaten. So konnte erst in allerjüngster Zeit, und zwar auf dem Umweg über die intermolekularen H -O-Bindungsvalenzen [26,27], eine für Strukturdiskussionen geeignete uOD vs. /-OH-Korrelationskurve abgeleitet werden (s. Abb. …”