Results 31 to 40 of about 1,936,115 (314)

A Spectroscopic Overview of Intramolecular Hydrogen Bonds of NH…O,S,N Type

open access: yesMolecules, 2021
Intramolecular NH…O,S,N interactions in non-tautomeric systems are reviewed in a broad range of compounds covering a variety of NH donors and hydrogen bond acceptors. 1H chemical shifts of NH donors are good tools to study intramolecular hydrogen bonding.
Poul Erik Hansen
doaj   +1 more source

Dual-Hydrogen-Bond Donor and Brønsted Acid Co-Catalysis Enables Highly Enantioselective Protio-Semipinacol Rearrangement Reactions [PDF]

open access: yes, 2023
A catalytic protio-semipinacol ring-expansion reaction has been developed for the highly enantioselective conversion of ter-tiary vinyl cyclopropanols into cyclobutanone products bearing alpha-quaternary stereogenic centers.
Eric, Jacobsen   +13 more
core   +2 more sources

Structures of disodium hydrogen citrate monohydrate, Na2HC6H5O7(H2O), and diammonium sodium citrate, (NH4)2NaC6H5O7, from powder diffraction data

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2020
The crystal structures of disodium hydrogen citrate monohydrate, Na2HC6H5O7(H2O), and diammonium sodium citrate, (NH4)2NaC6H5O7, have been solved and refined using laboratory X-ray powder diffraction data, and optimized using density functional ...
Jerry Hong   +3 more
doaj   +1 more source

Crystal structure of 3-[({2-[bis(2-hydroxybenzyl)amino]ethyl}(2-hydroxybenzyl)amino)methyl]-2-hydroxy-5-methylbenzaldehyde

open access: yesActa Crystallographica Section E, 2014
The non-symmetric title molecule, C32H34N2O5, is based on a tetrasubstituted ethylenediamine backbone. The molecular structure consists of three hydroxybenzyl groups and one 2-hydroxy-5-methylbenzaldehyde group bonded to the N atoms of the diamine unit ...
Alexandra S. Fonseca   +1 more
doaj   +1 more source

Understanding hydrogen electrocatalysis by probing the hydrogen-bond network of water at the electrified Pt/solution interface [PDF]

open access: yes, 2023
A grand challenge in electrochemistry is to understand and promote electrochemical processes by exploring and exploiting the interface. Herein, we promoted the hydrogen evolution and oxidation reactions (HER/HOR) of platinum (Pt) in base by introducing N-
Lu, Ma   +14 more
core   +2 more sources

Hydrogen Bonds in Polymer Folding [PDF]

open access: yesPhysical Review Letters, 2001
Physical Review ...
1.2. J. Borg   +3 more
openaire   +4 more sources

N-(3-Methylphenyl)-N′-(4-nitrobenzoyl)thiourea

open access: yesActa Crystallographica Section E, 2008
Two molecules of the title compound, C15H13N3O3S, are linked by an intermolecular N—H...S hydrogen bond. There is also an intramolecular N—H...O hydrogen bond, forming a six-membered ring.
Liang Xian
doaj   +1 more source

Hydrogen- and Covalent-Bond-Linked 3D Manganese Array

open access: yes, 2016
Hydrogen- and Covalent-Bond-Linked 3D Manganese ...
Youngkyu Do (1862842)   +1 more
core   +1 more source

Hydrogen-bonding study of photoexcited 4-nitro-1,8-naphthalimide in hydrogen-donating solvents

open access: yesOpen Physics, 2016
The solute–solvent interactions of 4-nitro-1,8-naphthalimide (4NNI) as a hydrogen bond acceptor in hydrogen donating methanol (MeOH) solvent in electronic excited states were investigated by means of the time-dependent density functional theory(TDDFT ...
Cao Jianfang   +5 more
doaj   +1 more source

Intramolecular Hydrogen Bond Energy and Its Decomposition—O–H∙∙∙O Interactions

open access: yesCrystals, 2020
The method to calculate the energy of intramolecular hydrogen bond is proposed and tested for a sample of malonaldehyde and its fluorine derivatives; the corresponding calculations were performed at the ωB97XD/aug-cc-pVTZ level.
Sławomir J. Grabowski
doaj   +1 more source

Home - About - Disclaimer - Privacy