Dihydrogen bond: Difference between revisions

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| date = 1996-01-01
| pmid = 19904922
}}</ref> In other words, the amine is a protic acid and the borane end is hydridic. The resulting B&minus;H<sup>...</sup>H&minus;N attractions stabilize the molecule as a solid. In contrast, the related substance [[ethane]], H<sub>3</sub>CCH<sub>3</sub>, is a gas with a boiling point 285 °C lower. Because two hydrogen centers are involved, the interaction is termed a dihydrogen bond. Formation of a dihydrogen bond is assumed to precede formation of H<sub>2</sub> from the reaction of a hydride and a protic acid. A very short dihydrogen bond is observed in NaBH<sub>4</sub>·2H<sub>2</sub>O with H&minus;H contacts of 1.79, 1.86, and 1.94 Å.<ref name=ChemRev>{{Cite journal
 
Formation of a dihydrogen bond is assumed to precede formation of H<sub>2</sub> from the reaction of a hydride and a protic acid. A very short dihydrogen bond is observed in NaBH<sub>4</sub>·2H<sub>2</sub>O with H&minus;H contacts of 1.79, 1.86, and 1.94 Å.<ref name=ChemRev>{{Cite journal
| doi = 10.1021/cr000021b
| volume = 101
| title = Metal Dihydrogen and -Bond Complexes - Structure, Theory, and Reactivity
| date = 2001-08-31
}}</ref> Other so-called [[hydrogen hydrogen bond]] interactions have been shown to exist in certain compounds between two neutral non-bonding hydrogen atoms.
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Other so-called [[hydrogen hydrogen bond]] interactions have been shown to exist in certain compounds between two neutral non-bonding hydrogen atoms.
<ref>{{Cite journal
| doi = 10.1039/C3CC46048G
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