The contribution of each H‐bond interaction in α‐helices was estimated in detail from the entire conformation energies, and the results were compared with those in the minimal H‐bond models, in which only H
volving riboflavine Donors and acceptors of hydrogen in oxidation-reduction reactions involving riboflavineDonors and acceptors of hydrogen in oxidation-reduction reactions involving riboflavineKolesnikov, P A
Other weak hydrogen bonds can be established with aromatic groups (e.g. indole) acting as donors or acceptors [38, 39]. When the electronegative atoms D and A become closer, the barrier for transfer of the H atom between D and A is lowered. It can eventually become low enough so that...
Proteins contain many hydrogen bond donors and acceptors, including amide (-NH) donors and carbonyl (-CO) acceptors along the peptide backbone and the polar functional groups on the side chains of individual amino acids. Let’s take a look at these properties and the corresponding importance of ...
Carboxylic acids act as both hydrogen bond acceptors and donors. Due to the presence of the carbonyl group, it acts as a hydrogen bond acceptor. The presence of the hydroxyl group makes it hydrogen bond donors. This helps them to participate in hydrogen bonding. Carboxylic acids usually exist ...
One way to assess hydrogen bonding strength experimentally is the measurement of hydrogen bonding equilibrium constants: hydrogen bond donors are measured against a common hydrogen bond acceptor and acceptors against a common donor. Abraham and co-workers found that data measured against different hydrogen...
Aminobenzamides, for example, are commonly used as hydrogen-bond donors to form intramolecular hydrogen bonds with other O- or N-groups as hydrogen-bond acceptors [5,6]. Molecules 2017, 22, 83; doi:10.3390/molecules22010083 www.mdpi.com/journal/molecules Molecules 2017, 22, 83 2 of 14 The...
processes Article Effect of Hydrogen Bond Donors and Acceptors on CO2 Absorption by Deep Eutectic Solvents Tausif Altamash 1, Abdulkarem Amhamed 1 , Santiago Aparicio 2,* and Mert Atilhan 3,* 1 Qatar Environment & Energy Research Institute, Hamad Bin Khalifa University, Doha 34110, Qatar; t...
hydrogen bond A chemical bond in which a hydrogen atom that is already bonded to an atom in a molecule forms a second bond with another atom, either in the same molecule or in a different one. The second atom is usually of a type that strongly attracts electrons, such as nitrogen or ox...
This covalency tends to be more extreme when acceptors bind hydrogens from more electronegative donors.Strong covalency in a hydrogen bond raises the questions: "To which molecule or atom does the hydrogen nucleusbelong?" and "Which should be labelled 'donor' and which 'acceptor'? According to ...