Results 21 to 30 of about 1,847,339 (304)
Study on the turn structure of polypeptides containing glycine and L-proline
Journal of Hebei University of Science and Technology, 2016 The formation of turn structure in peptide chains has direct relations with intramolecular hydrogen bonds, therefore the existence of this bond can be tested to research the turn structure.
Yong ZHANG +3 more
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Ethyl (E)-3-anilino-2-cyano-3-mercaptoacrylate
Acta Crystallographica Section E, 2008 In the title compound, C12H12N2O2S, there are S—H...N and N—H...O hydrogen-bond interactions. The N—H...O hydrogen bond is bifurcated, with the hydrogen being simultaneously donated to two equivalent O atoms, forming one intra- and one ...
Yong-Qi Qin +3 more
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“Hydridic Hydrogen-Bond Donors” Are Not Hydrogen-Bond Donors [PDF]
Journal of the American Chemical SocietyHerein, we dismiss a recent proposal by Civiš, Hobza, and co-workers to modify the IUPAC definition of hydrogen bonds in order to expand the scope from protonic Y-Hδ+ to hydridic Y-Hδ- hydrogen-bond donor fragments [J. Am. Chem. Soc. 2023, 145, 8550].
Lucas de Azevedo Santos +3 more
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Hydrogen-Bond-Promoted Sucrose Conversion in a Separable Eutectic Mixture Solvent System
, 2022 A eutectic mixture solvent (EMS) system containing 1,4-butylene glycol (1,4-BDO), choline chloride (ChCl), and sucrose was proposed for the conversion of sucrose to 5-hydroxymethylfurfural (HMF) with mesoporous hollow silica–alumina nanosphere (SAN ...
Sufei Feng (13013936) +4 more
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Supercritical Water is not Hydrogen Bonded [PDF]
Angewandte Chemie, 2020 AbstractThinking about water is inextricably linked to hydrogen bonds, which are highly directional in character and determine the unique structure of water, in particular its tetrahedral H‐bond network. Here, we assess if this common connotation also holds for supercritical water.
Philipp Schienbein, Dominik Marx
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A Mechanochromic Hydrogen‐Bonded Rotaxane [PDF]
Macromolecular Rapid Communications, 2020 AbstractTensile forces influence a variety of important biological processes and force sensors are required to study these processes in vivo. Current force sensors are often tailor‐made for a specific application, or activate at much higher forces than those observed at the cellular or tissue level. A versatile force sensor, with tunable mechanical and
Rafael Sandoval‐Torrientes +2 more
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(E)-4-Hydroxy-N′-(2-hydroxy-4-methoxybenzylidene)benzohydrazide N,N-dimethylformamide solvate
Acta Crystallographica Section E, 2009 The Schiff base molecule of the title compound, C15H14N2O4·C3H7NO, adopts a trans configuration with respect to the C=N double bond; the Schiff base itself is nearly planar (r.m.s. deviation 0.20 Å).
Nooraziah Mohd Lair +2 more
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A Spectroscopic Overview of Intramolecular Hydrogen Bonds of NH…O,S,N Type
Molecules, 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
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Acta 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
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Acta 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
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