Investigation of the Localized Corrosion of Ni-Cr-Mo-W Alloy UNS N06022 in Aprotic Solvents at Room Temperature

2020 ◽  
Vol MA2020-02 (10) ◽  
pp. 1204-1204
Author(s):  
Pedro Atz Dick ◽  
Robert Kelly
Keyword(s):  
Room Temperature ◽  
Localized Corrosion ◽  
Aprotic Solvents

A comparative study of metal-catalyzed three-component synthesis of α-aminophosphonates

2021 ◽  
pp. 221-234
Author(s):  
Marwa M. Abdeen ◽  
Mohamed A. Hamed ◽  
Abdel Aleem Hassan Abdel Aleem ◽  
Ibrahim F. Nassar ◽  
Ibrahim E.T. El-Sayed
Keyword(s):  
Carbonyl Compounds ◽  
Room Temperature ◽  
Lithium Perchlorate ◽  
Aprotic Solvents ◽  
Electronic Factor ◽  
One Pot ◽  
Catalyst Type ◽  
Metal Catalyzed ◽  
The One ◽  
Metal Triflates

Different metal catalysts have been tested for the one-pot transformation of carbonyl compounds, amines and phosphites to α-aminophosphonates. The influence of catalyst type, amount, solvent and the substrate electronic factor have been investigated. The results revealed that the carbonyl compounds could be smoothly converted into α-aminophosphonates at room temperature in good to excellent yields, with or without solvent in a reasonable reaction time. These results suggested that among others, lithium perchlorate and metal triflates were proven to be effective catalysts in 10 moles % catalysts. Polar aprotic solvents proved to be the best for the synthesis of α-aminophosphonates. The synthesized compounds' structure characterizations were elucidated by different spectroscopic tools and showed results consistent with the expected structures.

scholarly journals Computational modeling of cathodic limitations on localized corrosion of wetted SS 316L at room temperature

2005 ◽  
Vol 47 (12) ◽  
pp. 2987-3005 ◽  
Author(s):  
Fushuang Cui ◽  
Francisco J. Presuel-Moreno ◽  
Robert G. Kelly
Keyword(s):  
Computational Modeling ◽  
Room Temperature ◽  
Localized Corrosion

Thiol-Michael addition in polar aprotic solvents: nucleophilic initiation or base catalysis?

2017 ◽  
Vol 8 (8) ◽  
pp. 1341-1352 ◽  
Author(s):  
Gilles B. Desmet ◽  
Maarten. K. Sabbe ◽  
Dagmar. R. D'hooge ◽  
Pieter Espeel ◽  
Sensu Celasun ◽  
...  
Keyword(s):  
Michael Addition ◽  
Room Temperature ◽  
Ethyl Acrylate ◽  
Base Catalysis ◽  
Aprotic Solvents

The thiol-Michael addition of ethanethiol to ethyl acrylate, methyl vinylsulfone and maleimide initiated by ethyl-, diethyl-, triethylamine and triethylphosphine in tetrahydrofuran (THF) is investigated at room temperature.

5-Substituted 2-furancarbaldehydes and water-soluble furan derivatives

1982 ◽  
Vol 47 (3) ◽  
pp. 961-966 ◽  
Author(s):  
Daniel Végh ◽  
Jaroslav Kováč ◽  
Miloslava Dandárová
Keyword(s):  
Room Temperature ◽  
Furan Ring ◽  
Water Soluble ◽  
Ammonium Salts ◽  
Aprotic Solvents ◽  
Furan Derivatives ◽  
Simple Preparation

5-Halo-2-furaldehydes Ia, Ib react with trimethylamine in aprotic solvents to furnish 5-trimethyl-ammonium salts of 2-furaldehyde IIa, IIb. The reactivity of this salt was utilized for a simple preparation of 5-substituted 2-furaldehydes IV in water at room temperature. The possibility to synthesize azomethines V and ethylenes VI, having the trimethylammonium group in position 5 of the furan ring maintained, is discussed.

Synthese und Kristallstrukturbestimmung von Silicium-Komplexen der Koordinationszahl sechs mit Dimethylpyridinen/ Syntheses and Crystal Structure Determination of Hexacoordinated Silicon-Complexes with Dimethylpyridines

2000 ◽  
Vol 55 (10) ◽  
pp. 901-906 ◽  
Author(s):  
Karl Hensena ◽  
Markus Kettner ◽  
Thorsten Stumpf ◽  
Michael Bolte
Keyword(s):  
Crystal Structure ◽  
Structure Analysis ◽  
Silicon Atom ◽  
Structure Determination ◽  
Room Temperature ◽  
Crystal Structure Determination ◽  
Aprotic Solvents ◽  
X Ray

Abstract Trichlorosilane, HSiCl3, forms with 3,4-dimethylpyridine in aprotic solvents a crystalline l:2-compound which is stable at room temperature and readily soluble in CHCl3. Colourless crystals of the dicationic complex, [H2Si(3,4-dimethylpyridine)4]2+ 2Cl- · 6 CHCl3 (verified by X-ray structure analysis) are obtained by dismutation of HSiCl3(3,4-dimethylpyridine)2 in CHCl3 within one week at room temperature.29Si NM R indicates that SiCl4 is generated as a second product. H2SiCl2 with 2,4-dimethylpyridine as well as MeHSiBr2 with 3,5-dimethylpyridine in aprotic solvents form 1:2-compounds stable at room temperature. X-ray structure analyses in both cases establish neutral-complexes with a hexa-coordinated silicon atom

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