hydrogen bond


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Related to hydrogen bond: ionic bond, Van der Waals bond

hydrogen bond

[′hī·drə·jən ′bänd]
(physical chemistry)
A type of bond formed when a hydrogen atom bonded to atom A in one molecule makes an additional bond to atom B either in the same or another molecule; the strongest hydrogen bonds are formed when A and B are highly electronegative atoms, such as fluorine, oxygen, or nitrogen.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
From theoretical point of view, fascinating conclusions can be drawn from the calculations involving spin-spin coupling constants between the nuclei of hydrogen bond donor and acceptor as calculated at the B3LYP/6-311++G(2d,3p) level of theory.
This result indicates that the thermoreversibility only takes place due to the breakage of hydrogen bond at high temperature, while during cooling hydrogen bonding can reform slowly.
The nitrogen in the conjugated moiety of DBT has the isolated electron pair, which could act as hydrogen-bond acceptors to form hydrogen bonds with other donor functional groups or molecules.
Furthermore, compared with the wild type, the ligand was still located in the binding pocket of these mutants, as shown in Figures 3(d)-3(h), although there were different ligand-conformational changes due to hydrogen bond rupture.
O): the hydrogen bond with a force constant of 0.108 x[10.sup.5] dyn/cm and the hydroxyl linkage with a force constant of ~8.45 x [10.sup.5] dyn/cm.
In 4, the similar intramolecular hydrogen bond O(5)-H(5)***O(6) with 3 is included.
3, the C=O peaks are composed of two components: A hydrogen bonded group at relatively lower wavenumbers (C=[O.sub.H].
The increased solubility of glibenclamide occurs due to the formation of hydrogen bonds between glibenclamide and oxalic acid.
B hydrogen bond strongly depends on the nature of the proton donor and increases when hydrogen atoms are replaced by electron-withdrawing substituents [9, 46].
Figure 6 shows the hydrogen bond interactions associated with the ligand and the surrounding protein residues in the LRDPSO docking result.
We have conducted density functional theory (DFT) calculations to prove that selected hybrid functionals and basis sets are particularly suitable for the calculations of the structural parameters, intermolecular hydrogen bonds, and equilibrium constant between Z and E isomers for oximes.