Hydrogen bonds in solid hydroxides, a bond valence approach

Predicting Frequency from the External Chemical Environment: OH Vibrations on Hydrated and Hydroxylated Surfaces

“…Examples of correlations between the vibrational OH frequency and the geometric bond order in inorganic bulk crystals are found in refs and .…”

Synthesis of 2,5-bis(9H-fluoren-9-ylidene)-2,5-dihydrothiophene derivatives and a systematic study of the substituent effect

“…As comparison, the introduction of alkoxy groups only increased the dihedral angles (M and N) of B5 and B6 to 18.5°–19.5°, which might be caused by the weak repulsion interaction between the hydrogen atom of the fluorenylidene moiety and the oxygen atom of the alkoxy group. 23 The increase of dihedral angles should be responsible for the requirement of high temperature for the oxidation step in the synthesis of ThBF derivatives. The reduction of the molar extinction coefficient for B2–B4 and B7–B9 might also be caused by the increase of dihedral angles, which hinder the electron flow along the quinoidal π-conjugation system.…”

Reversible in situ precipitation: a flow-through approach for coating macroporous supports with metal hydroxides

“…The strength of hydrogen bonding of metal hydroxides is inuenced by various structural and intermolecular bonding factors of the molecule which is in turn dependent on the type of metal ion present in the metal hydroxide molecule. 23,24 Thus, it could be that the aluminium hydroxide has a weaker affinity to the polymer backbone than iron hydroxide and hence is less preferentially attached on the polymer backbone in the presence of iron hydroxide.…”