Results 121 to 130 of about 2,752,747 (293)

3,4-Diaminopyridinium hydrogen succinate

open access: yesActa Crystallographica Section E, 2009
In the title compound, C5H8N3+·C4H5O4−, the pyridine N atom of the 3,4-diaminopyridine molecule is protonated. The protonated N atom participates in an N—H...O hydrogen bond to a succinate O atom of the singly deprotonated ...
Hoong-Kun Fun, Kasthuri Balasubramani
doaj   +1 more source

Sticking of atomic hydrogen on graphene

open access: yesJournal of Physics: Condensed Matter, 2018
Recent years have witnessed an ever growing interest in the interactions between hydrogen atoms and a graphene sheet. Largely motivated by the possibility of modulating the electric, optical and magnetic properties of graphene, a huge number of studies have appeared recently that added to and enlarged earlier investigations on graphite and other carbon
Bonfanti, Matteo   +2 more
openaire   +5 more sources

Rational Design of Graphene‐Supported Single Atom Catalysts for Hydrogen Evolution Reaction

open access: yesAdvanced Energy Materials, 2019
The proper choice of nonprecious transition metals as single atom catalysts (SACs) remains unclear for designing highly efficient electrocatalysts for hydrogen evolution reaction (HER).
M. Hossain   +14 more
semanticscholar   +1 more source

2-Phenyl-2-(pyridin-2-yl)hexahydropyrimidine

open access: yesActa Crystallographica Section E, 2010
The title compound, C15H17N3, was prepared by reaction of benzoylpyridine and hexahydropyrimidine. The 1,3-diazinane ring adopts a chair conformation with one N—H group axial and the other equatorial.
Naleen B. Jayaratna, Richard E. Norman
doaj   +1 more source

Fock's theory of hydrogen atom and quantum space [PDF]

open access: yesarXiv, 1999
It is shown that V.A.Fock's theory of hydrogen atom gives an example of the non-relativistic Snyder-like Quantum Geometry (QG).
arxiv  

Hydrazinium 2-amino-4-nitrobenzoate dihydrate: crystal structure and Hirshfeld surface analysis

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2017
In the anion of the title salt hydrate, H5N2+·C7H5N2O4−·2H2O, the carboxylate and nitro groups lie out of the plane of the benzene ring to which they are bound [dihedral angles = 18.80 (10) and 8.04 (9)°, respectively], and as these groups are ...
James L. Wardell   +2 more
doaj   +1 more source

The Rest Mass of the Hydrogen Atom from First Principles [PDF]

open access: yesarXiv, 1999
The rest mass of the hydrogen atom in its ground state is calculated from first physical principles and elementary geometric considerations.
arxiv  

Turbulence in Atomic Hydrogen [PDF]

open access: yes, 1999
Understanding the properties of interstellar turbulence is a great intellectual challenge and the urge to solve this problem is partially motivated by a necessity to explain the star formation mystery. This review deals with a recently suggested inversion technique as applied to atomic hydrogen.
openaire   +3 more sources

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