In chemistry, a hydrogen bond is a primarily electrostatic force of attraction between a hydrogen atom which is covalently bound to a more electronegative "donor" atom or group, and another electronegative atom bearing a lone pair of electrons—the hydrogen bond acceptor .
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Hydrogen bond is an attractive interaction between a hydrogen atom from a molecule or a molecular fragment in which X is more electronegative than H, and an atom or a group of atoms in the same or a different molecule, in which there is evidence of bond formation.
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Resonance assisted hydrogen bond is a strong type of hydrogen bond.
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Moore and Winmill used the hydrogen bond to account for the fact that trimethylammonium hydroxide is a weaker base than tetramethylammonium hydroxide.
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Where the Hydrogen bond strengths are more equivalent, one might instead find the atoms of two interacting water molecules partitioned into two polyatomic ions of opposite charge, specifically hydroxide and hydronium .
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Protein backbone hydrogen bond incompletely shielded from water attack is a dehydron.
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Furthermore, the dehydration stabilizes the hydrogen bond by destabilizing the nonbonded state consisting of dehydrated isolated charges.
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Symmetric hydrogen bond is a special type of hydrogen bond in which the proton is spaced exactly halfway between two identical atoms.
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Hydrogen bond can be compared with the closely related dihydrogen bond, which is an intermolecular bonding interaction involving hydrogen atoms.
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Generally, the hydrogen bond is characterized by a proton acceptor that is a lone pair of electrons in nonmetallic atoms .
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