SCR of NOx by NH3 over model catalysts: The kinetic data-linear free energy relation

2013 ◽  
Vol 31 ◽  
pp. 11-15 ◽  
Author(s):  
Isidro Mejía-Centeno ◽  
Salvador Castillo ◽  
Roberto Camposeco ◽  
Gustavo A. Fuentes
Keyword(s):  
Free Energy ◽  
Kinetic Data ◽  
Model Catalysts ◽  
Energy Relation ◽  
Linear Free Energy ◽  
Free Energy Relation ◽  
Scr Of Nox

The transmission of polar effects. Part VI. The ionization of ortho-substituted benzoic acids

1968 ◽  
Vol 46 (18) ◽  
pp. 2941-2944 ◽  
Author(s):  
Keith Bowden ◽  
G. E. Manser
Keyword(s):  
Free Energy ◽  
Benzoic Acid ◽  
Field Effect ◽  
Energy Relation ◽  
Benzoic Acids ◽  
Linear Free Energy ◽  
Free Energy Relation ◽  
Substituted Benzoic Acids ◽  
Reaction Constants

The pKa values of a series of ortho-substituted benzoic acids in 50% ethanol–water have been determined. The effect of ortho-substitution on the ionization of benzoic acid in this and other solvents has been correlated by a linear free energy relation. The reaction constants found are compared with those for the meta/para-substituted benzoic acids. While those for the former system are insensitive to changes in the medium, the latter vary considerably. It is suggested that this is due to transmission by the field effect passing almost entirely through the molecular cavity for ortho-substituents.

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