(redirected fromHydrogen bonds) Thesaurus Medical Encyclopedia hydrogen bond n. A chemical bond in which a hydrogen atom of one molecule is attracted to an electronegative atom, especially a nitrogen, oxygen, or fluorine atom, usually of another molecule. ...
Hydrogen bonding, interaction involving a hydrogen atom located between a pair of other atoms having a high affinity for electrons; such a bond is weaker than an ionic bond or covalent bond but stronger than the van der Waals forces. Hydrogen bonds can exist between atoms in different molecules...
The hydrogen bond requires only 8–40 kJ mol−1 to break, compared to much higher values for covalent bonds such as CC (346 kJ mol−1) or CH (411 kJ mol−1). This low bond energy makes it useful, because it means that the bond can form and break under the influence of ...
These bonds can occur between molecules (intermolecularly ), or within different parts of a single molecule (intramolecularly ). The hydrogen bond (5 to 30 kJ/mole) is stronger than a van der Waals interaction, but weaker than covalent or ionic bonds. This type of bond occurs in both ...
Hydrogen bonds (H-bonds) are the most essential non-covalent interactions in nature, playing a crucial role in stabilizing the secondary structures of proteins. Taking inspiration from nature, researchers have developed several multiple H-bonds crosslinked supramolecular polymer materials through the ...
Describe the formation of a covalent bond in H2 from atoms. What does it mean to say that the bonding electrons are shared by the two atoms? For single bonds between similar types of atoms, how does the strength of the bond relate to the size of the atoms...
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A hydrogen bond tends to be stronger thanvan der Waals forces, but weaker thancovalent bondsorionic bonds. It is about 1/20th (5%) the strength of the covalent bond formed between O-H. However, even this weak bond is strong enough to withstand slight temperature fluctuation. ...
The structure, hydrogen bonding, and hydrogen transfer of 1-butyl-3-methylimidazolium hydroxide ([Bmim]OH) aggregations, including dimer and trimer of carbene(α) and covalent(β) conformation, have been investigated using density functional theory B3LYP together with D3 dispersion correction. The geo...
role in the history of structural biology. Both the structure of DNA and of protein a-helices and b-sheets were predicted based largely on the hydrogen bonds these structures form. So understanding hydrogen bonds is clearly important, but much like the hydrophobic effect, hydrogen bonds are ...