Kinetics and mechanism of thermal gas-phase elimination of ?-substituted carboxylic acids: role of relative basicity of ?-substituents and acidity of incipient proton

2000 ◽  
Vol 13 (9) ◽  
pp. 499-504 ◽  
Author(s):  
Nouria A. Al-Awadi ◽  
Kamini Kaul ◽  
Osman M. E. El-Dusouqui
Keyword(s):  
Gas Phase ◽  
Carboxylic Acids ◽  
Kinetics And Mechanism ◽  
Relative Basicity ◽  
Phase Elimination

Kinetics and mechanism of thermal gas-phase elimination of β-substituted carboxylic acids

Tetrahedron ◽  
2005 ◽  
Vol 61 (24) ◽  
pp. 5769-5777 ◽  
Author(s):  
S.A. Al-Awadi ◽  
M.R. Abdallah ◽  
H.H. Dib ◽  
M.R. Ibrahim ◽  
N.A. Al-Awadi ◽  
...  
Keyword(s):  
Gas Phase ◽  
Carboxylic Acids ◽  
Kinetics And Mechanism ◽  
Phase Elimination

Kinetics and mechanism of thermal gas-phase elimination of 2-aryloxyacetic acid

2001 ◽  
Vol 33 (10) ◽  
pp. 612-616 ◽  
Author(s):  
Nouria A. Al-Awadi ◽  
Ajith Kumar ◽  
Gabriel Chuchani ◽  
Armando Herize
Keyword(s):  
Gas Phase ◽  
Kinetics And Mechanism ◽  
Phase Elimination

Kinetics and mechanism of thermal gas-phase elimination of α- and β- (N-arylamino)propanoic acid: experimental and theoretical analysis

Tetrahedron ◽  
2004 ◽  
Vol 60 (13) ◽  
pp. 3045-3049 ◽  
Author(s):  
Sundus A. Al-Awadi ◽  
Mariam R. Abdallah ◽  
Mohamad A. Hasan ◽  
Nouria A. Al-Awadi
Keyword(s):  
Theoretical Analysis ◽  
Gas Phase ◽  
Kinetics And Mechanism ◽  
Propanoic Acid ◽  
Phase Elimination

ChemInform Abstract: Homogeneous, Unimolecular, Gas-Phase Elimination of Leaving Groups at the Alkoyl Side of Carboxylic Acids

ChemInform ◽  
2010 ◽  
Vol 27 (51) ◽  
pp. no-no
Author(s):  
G. CHUCHANI ◽  
A. ROTINOV ◽  
R. M. DOMINGUEZ ◽  
I. MARTIN
Keyword(s):  
Gas Phase ◽  
Carboxylic Acids ◽  
Leaving Groups ◽  
Phase Elimination

The kinetics and mechanism of the homogeneous, unimolecular gas-phase elimination of 2-(4-substituted-phenoxy)tetrahydro-2H -pyranes

2017 ◽  
Vol 31 (3) ◽  
pp. e3778
Author(s):  
Alvaro Alvarez-Aular ◽  
Loriett Cartaya ◽  
Alexis Maldonado ◽  
David Santiago Coll ◽  
Gabriel Chuchani
Keyword(s):  
Gas Phase ◽  
Kinetics And Mechanism ◽  
Phase Elimination

scholarly journals The role of radiolysis in the modelling of C2H4O2 isomers and dimethyl ether in cold dark clouds

2020 ◽  
Vol 500 (3) ◽  
pp. 3414-3424
Author(s):  
Alec Paulive ◽  
Christopher N Shingledecker ◽  
Eric Herbst
Keyword(s):  
Gas Phase ◽  
Dimethyl Ether ◽  
Recent Observation ◽  
Cosmic Ray ◽  
Thermal Method ◽  
Dark Clouds ◽  
Ice Surface ◽  
Dust Grain ◽  
Complex Organic

ABSTRACT Complex organic molecules (COMs) have been detected in a variety of interstellar sources. The abundances of these COMs in warming sources can be explained by syntheses linked to increasing temperatures and densities, allowing quasi-thermal chemical reactions to occur rapidly enough to produce observable amounts of COMs, both in the gas phase, and upon dust grain ice mantles. The COMs produced on grains then become gaseous as the temperature increases sufficiently to allow their thermal desorption. The recent observation of gaseous COMs in cold sources has not been fully explained by these gas-phase and dust grain production routes. Radiolysis chemistry is a possible non-thermal method of producing COMs in cold dark clouds. This new method greatly increases the modelled abundance of selected COMs upon the ice surface and within the ice mantle due to excitation and ionization events from cosmic ray bombardment. We examine the effect of radiolysis on three C2H4O2 isomers – methyl formate (HCOOCH3), glycolaldehyde (HCOCH2OH), and acetic acid (CH3COOH) – and a chemically similar molecule, dimethyl ether (CH3OCH3), in cold dark clouds. We then compare our modelled gaseous abundances with observed abundances in TMC-1, L1689B, and B1-b.

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