ABSTRACT Hydrogen bonding in inorganic solids like salts, hydrates, hydroxides, oxoacids, amides, sulfides, etc., is reviewed with respect to the various structural motifs X-H···Yn possible, and the strength and nature of the bonds formed. Experimental (X-ray, neutron, IR, Raman, NMR, NQR, etc.) and theoretical (ab-initio, density functional, etc.) results on X-H(D)···Y bond lengths and angles, frequencies, intensities, and half widths of the respective X-H stretching and X- H(D) ···Y bending vibrations, 1H MAS NMR chemical shifts and 2D NQR coupling constants are reviewed. In addition, the importance of hydrogen bonds on polymorphism and phase transitions as well as the influence of H/D isotope effects on the strength and properties of hydrogen bonds are reported.
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