Results 11 to 20 of about 1,847,339 (304)

Hydrogen bond donors in drug design [PDF]

open access: yes, 2022
In medicinal chemistry, hydrogen bond donors are seen to cause more problems than hydrogen bond acceptors and this study examines hydrogen bond donor-acceptor asymmetries in the context of drug design.
Peter, Kenny
core   +1 more source

Revealing the Reasons for Degeneration of Resonance-Assisted Hydrogen Bond on the Aromatic Platform: Calculations of Ortho-, Meta-, Para-Disubstituted Benzenes, and (Z)-(E)-Olefins

open access: yesMolecules, 2023
The energies of the O−H∙∙∙O=C intramolecular hydrogen bonds were compared quantitatively for the series of ortho-disubstituted benzenes and Z-isomers of olefins via a molecular tailoring approach.
Andrei V. Afonin, Danuta Rusinska-Roszak
doaj   +1 more source

1H and 19F NMR chemical shifts for hydrogen bond strength determination: Correlations between experimental and computed values

open access: yesJournal of Magnetic Resonance Open, 2022
1H and 19F NMR methods based on chemical shift measurements of different hydrogen bond donors used for quantifying hydrogen bond strength were analyzed and compared. The extracted values from these different methods are shown to be highly correlated with
Claudio Dalvit   +2 more
doaj   +1 more source

Nature of the Hydrogen Bond Enhanced Halogen Bond

open access: yesMolecules, 2021
The factors responsible for the enhancement of the halogen bond by an adjacent hydrogen bond have been quantitatively explored by means of state-of-the-art computational methods. It is found that the strength of a halogen bond is enhanced by ca.
Susana Portela, Israel Fernández
doaj   +1 more source

Studies of Hydrogen Bond Vibrations of Hydrogen-Disordered Ice Ic

open access: yesCrystals, 2021
The hydrogen-disordered structure of ice, Ic, makes it difficult to analyze the vibrational normal modes in the far-infrared region (i.e., the molecular translation band).
Xu-Hao Yu   +8 more
doaj   +1 more source

Hydrogen Bonds

open access: yesMolecules, 2023
The Topical Collection “Hydrogen Bonds” is a continuation of the previous Special Issue “Intramolecular Hydrogen Bonding 2021” [...]
openaire   +3 more sources

Hydrogen-Bond-Promoted ORR Mechanism in P‑Doped Fe–N–C Materials

open access: yes, 2023
P-doping has been widely adopted in M–N–C materials to enhance the catalytic activity of oxygen reduction reaction (ORR). However, the ORR mechanism of P-doping remains elusive. Herein, based on the first-principles calculations, the stability of P-doped
Naiqin Zhao (1410178)   +7 more
core   +1 more source

Hydrophobic Molecules Slow Down the Hydrogen-Bond Dynamics of Water [PDF]

open access: yes, 2011
We study the spectral and orientational dynamics of HDO molecules in solutions of tertiary-butyl-alcohol (TBA), trimethyl-amine-oxide (TMAO), and tetramethylurea (TMU) in isotopically diluted water (HDO:D2O and HDO:H2O). The spectral dynamics are studied
Bakulin, Artem A.   +15 more
core   +3 more sources

Hydrogen-Bond-Promoted Planar Conformation, Crystallinity, and Charge Transport in Semiconducting Diazaisoindigo Derivatives

open access: yes, 2022
Conformational control of π-conjugated molecules using intramolecular noncovalent bonds represents a promising strategy to tailor the solid-state molecular packing and electronic properties of these materials.
Octavio Miranda (12700403)   +6 more
core   +1 more source

N′-(5-Bromo-2-hydroxybenzylidene)-3,4,5-trihydroxybenzohydrazide dihydrate

open access: yesActa Crystallographica Section E, 2008
The title compound, C14H11BrN2O5·2H2O, crystallizes as hydrogen-bonded sheets. The 2-hydroxy group on the benzylidene group forms an intramolecular hydrogen bond to the N atom of the C=N double bond.
Hapipah M. Ali   +4 more
doaj   +1 more source

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