Results 21 to 30 of about 3,073,614 (389)

From ab initio quantum chemistry to molecular dynamics: The delicate case of hydrogen bonding in ammonia [PDF]

open access: yes, 2003
The ammonia dimer (NH3)2 has been investigated using high--level ab initio quantum chemistry methods and density functional theory (DFT). The structure and energetics of important isomers is obtained to unprecedented accuracy without resorting to ...
Boese, A. Daniel   +3 more
core   +2 more sources

The Nature of Hydrogen Bonds: A Delineation of the Role of Different Energy Components on Hydrogen Bond Strengths and Lengths

open access: yesChemistry - An Asian Journal, 2019
Hydrogen bonds are a complex interplay between different energy components, and their nature is still subject of an ongoing debate. In this minireview, we therefore provide an overview of the different perspectives on hydrogen bonding.
Stephanie C. C. van der Lubbe   +1 more
semanticscholar   +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

The Ionic Hydrogen Bond [PDF]

open access: yesChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
openaire   +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 structures of N ′-Aminopyridine-2-carboximidamide and N ′-{[1-(pyridin-2-yl)ethylidene]amino}pyridine-2-carboximidamide [PDF]

open access: yes, 2017
© Eya'ane Meva et al. 2017. The crystal structures of N,-Aminopyridine-2-carboximidamide (C 6 H 8 N 4 ), 1, and N,-{[1-(pyridin-2-yl)ethylidene]amino}pyridine-2-carboximidamide (C 13 H 13 N 5 ), 2, are described.
Evans, David John   +3 more
core   +2 more sources

2-Hydroxybenzyl alcohol–phenanthroline (1/1)

open access: yesActa Crystallographica Section E, 2009
Crystals of the title compound, C12H8N2·C7H8O2, were obtained during cocrystallization experiments of a compound with two hydrogen-bond donors (2-hydroxybenzyl alcohol) with another compound containing two hydrogen-bond acceptors (phenanthroline)
Cuong Quoc Ton, Michael Bolte
doaj   +1 more source

Structural and dynamic properties of SPC/E water

open access: yes, 2010
I have investigated the structural and dynamic properties of water by performing a series of molecular dynamic simulations in the range of temperatures from 213 K to 360 K, using the Simple Point Charge-Extended (SPC/E) model.
Eisenberg, M. G. Campo
core   +2 more sources

Methyl 2-[(ferrocenylcarbonyl)amino]thiophene-3-carboxylate [PDF]

open access: yes, 2005
The title compound, [Fe(C₅H₅)(C₁₂H₁₀NO₃S)], was synthesized from ferrocenecarboxylic acid and methyl 2-aminothiophene-3-carboxylate in modest yield. The substituted ring system is essentially planar through the amidothienylcarboxylate moiety, η⁵-(C₅H₄ ...
Alley, Steven   +3 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

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