By Vladimir I. Bakhmutov
This definitive reference consolidates present wisdom on dihydrogen bonding, emphasizing its position in organizing interactions in numerous chemical reactions and molecular aggregations. After an outline, it analyzes the diversities among dihydrogen bonds, classical hydrogen bonds, and covalent bonds. It describes dihydrogen bonds as intermediates in intramolecular and intermolecular proton move reactions. It describes dihydrogen bonding within the solid-state, the fuel part, and in resolution. this is often the most advantageous reference for actual chemists, biochemists, biophysicists, and chemical engineers.
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12, an electric field can be applied in both directions, leading to different results: breaking of the H–H bond or approximation of both ions to the H2 molecule.
For H2 MOLECULE TO A DIHYDROGEN BOND VIA A DIHYDROGEN LIGAND 35 example, on the base of an x-ray crystal structure reported in 1934 for ammonium hypophosphite (NH4 + H2 PO2 − ) it was suggested that hydrogen atoms in the hypophosphite group behave like H− ions with respect to ammonium . However, this idea was refuted when restudy of the structure with accurate placement of hydrogen atoms demonstrated a lack of close H· · ·H contacts . This case illustrates problems that can appear in x-ray studies of proton–hydride interactions.