Results 21 to 30 of about 557 (107)

A theoretical study on the inhibition efficiencies of some quinoxalines as corrosion inhibitors of copper in nitric acid

open access: yesJournal of Saudi Chemical Society, 2011
Quantum chemical calculations based on DFT method were performed on three quinoxalines compounds namely ethyl 2-(4-(2-ethoxy-2-oxoethyl)-2-p-tolylquinoxalin-1(4H)-yl)acetate (Q1), 1-[4-acetyl-2-(4-chlorophenyl)quinoxalin-1(4H)-yl]acetone (Q2) and 2-(4 ...
Abdelkader Zarrouk   +6 more
doaj   +1 more source

Polyhydrures et nanoparticules : 35 ans avec la chimie organométallique

open access: yes, 2012
Formé en chimie organométallique à l’Imperial College, Bruno Chaudret s’est intéressé durant les années 1980-1990 à la chimie des interactions de l’hydrogène avec les métaux de transition, notamment les polyhydrures et les complexes de l’hydrogène ...
Chaudret, Bruno, Bruno Chaudret
core   +1 more source

Crystal structure of 25,27-dibenzyloxy-26-benzoyloxy-28-hydroxycalix[ 4]arene, C49H40O5

open access: yesZeitschrift für Kristallographie - New Crystal Structures, 2006
C49H40O5, triclinic, P1̅ (no. 2), a = 10.8865(2) Å, b = 18.2743(3) Å, c = 18.3545(3) Å, α = 85.166(1)°, β = 86.233(1)°, γ = 84.268(1)°, V = 3614.3 Å3, Z = 4, Rgt(F) = 0.054, wRref(F2) = 0.148, T = 120 K.
Kuhn P., Matt D., Toupet L., Louati A.
doaj   +1 more source

La chimie organométallique de surface appliquée aux structures organométalliques poreuses (MOF) : synthèses, caractérisations, et leurs applications en catalyse

open access: yes, 2011
Metal organic frameworks (MOF) are a new class of material, which consist of metal ions or clusters coordinated to organic ligands or metal-organic complexes and result in 1D, 2D or 3D crystalline networks.
Larabi, Cherif
core   +2 more sources

How an Internal Supramolecular Interaction Determines the Stereochemistry of a Metal Center

open access: yesOrganics
The chloro-P,N-{diphenylphosphanyl-[(5-phenyl-1,3,4-oxadiazol-2-ylamino)phenyl-me- thyl]}(p-cymene)ruthenium(II) hexafluorophosphate complex (4) was obtained in two steps from diphenylphosphanyl-[(5-phenyl-1,3,4-oxadiazol-2-ylamino)phenyl-methyl] borane (
Maxime Steinmetz   +2 more
doaj   +1 more source

Synthesis, Characterization and Study of Liquid Crystals Based on the Ionic Association of the Keplerate Anion [Mo132O372(CH3COO)30(H2O)72]42− and Imidazolium Cations

open access: yesInorganics, 2015
A series of eight new materials based on the ionic association between 1-methyl-3-alkylimidazolium cations and the nanometric anionic Keplerate [Mo132O372(CH3COO)30(H2O)72]42− has been prepared and characterized in the solid state.
Nancy Watfa   +9 more
doaj   +1 more source

Triplet State‐Promoted Kumada‐Corriu Coupling Catalyzed by Hydrotris(3,5‐diisopropylpyrazolyl)boratocobalt(III)diiodide

open access: yesEuropean Journal of Inorganic Chemistry, Volume 27, Issue 34, December 2, 2024.
The light‐sensitive Kumada‐Corriu C−C hetero‐coupling of halogeno‐arenes and an arylmagnesiumbromides promoted by TpiPrCoI2, occurs with yields>80 % thanks to a singlet‐to‐triplet spin state d‐d transitions at bisaryl‐cobalt catalytic intermediates. Abstract The Kumada‐Corriu hetero‐coupling between an halogeno‐arene and an arylmagnesiumbromide can be ...
Zekun Wang   +2 more
wiley   +1 more source

Harnessing supramolecular confinement for the semihydrogenation of aromatic alkynes

open access: yesDiscover Catalysis
The immobilization of 1-methyl-1,4-diazabicyclo[2.2.2]octane-1-ium iodide in a supramolecular capsule formed from 2,8,14,20-tetra-undecyl-resorcin[4]arene and water in the presence of hydrochloric acid enabled the reaction of silane with arylacetylenes ...
Maxime Steinmetz, David Sémeril
doaj   +1 more source

Electrochemical Evaluation and DFT Studies of 2-(4-chlorophenyl)-3-hydroxy-4,6-dioxo-8-phenyl-4,6 dihydropyrimido[2,1-b][1,3]thiazine-7-carbonitrile of Carbon Steel Corrosion in Hydrochloric Acid

open access: yesInternational Journal of Electrochemical Science, 2015
In present study corrosion inhibition property of 2-(4-chlorophenyl)-3-hydroxy-4,6-dioxo-8-phenyl 4,6-dihydropyrimido[2,1-b][1,3]thiazine-7-carbonitrile (CHPPC) in 1.0 M HCl was investigated using electrochemical impedance spectroscopy, potentiodynamic ...
M. Belayachi   +9 more
doaj   +1 more source

New pyrimidothiazine Derivative as Corrosion Inhibitor for Carbon Steel in Acidic Media

open access: yesInternational Journal of Electrochemical Science, 2015
2,8-bis(4-chlorophenyl)-3-hydroxy-4,6-dioxo-4,6-dihydropyrimido[2,1-b][1,3]thiazine-7-carbonitrile (CHPTC) was tested as corrosion inhibitor for carbon steel in 2.0 M H3PO4 by using polarization, electrochemical impedance spectroscopy (EIS) and ...
M. Belayachi   +9 more
doaj   +1 more source

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