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In chemistry, a dihydrogen bond is a kind of hydrogen bond, an interaction between a metal hydride bond and an OH or NH group or another proton donor. This is distinct from a transition metal dihydrogen complex having molecular hydrogen bound to a metal and first synthesized by G.J. Kubas et al. in 1984.
In a very recent development, hydrogen bonds have been noted between two hydrogen atoms having opposite polarity. An example occurs in the molecule H3NBH3 where the hydrogen atoms on nitrogen have a partial positive charge and the hydrogen atoms on boron have a partial negative charge. The resulting BH...HN attractions cause the molecule to be a solid material rather than a gas as is the case in the closely related substance, H3CCH3. Because two hydrogen atoms are involved, this is termed a dihydrogen bond.
References
- A New Intermolecular Interaction: Unconventional Hydrogen Bonds with Element-Hydride Bonds as Proton Acceptor Robert H. Crabtree, Per E. M. Siegbahn, Odile Eisenstein, Arnold L. Rheingold, and Thomas F. Koetzle Acc. Chem. Res. 1996, 29(7), 348 - 354.
See also
"Dihydrogen bond"