Basicity of pyridine and some substituted pyridines in ionic liquids.
The equilibrium constants for ion pair formation of some pyridines have been evaluated by spectrophotometric titration with trifluoroacetic acid in different ionic liquids. The basicity order is the same in ionic liquids and in water. The substituent effect on the equilibrium constant has been discussed in terms of the Hammett equation. Pyridine basicity appears to be less sensitive to the substituent effect in ionic liquids than in water.
Angelini
Guido
G
Dipartimento di Scienze del Farmaco, Università G. d'Annunzio Via dei Vestini 31, Chieti, Italy.
De Maria
Paolo
P
Chiappe
Cinzia
C
Fontana
Antonella
A
Pierini
Marco
M
Siani
Gabriella
G
D006863:Hydrogen-Ion Concentration; D052578:Ionic Liquids / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D017186:Titrimetry; D014269:Trifluoroacetic Acid
D052578:Ionic Liquids; D011725:Pyridines; D014269:Trifluoroacetic Acid; C023666:pyridine