title: Basicity of pyridine and some substituted pyridines in ionic liquids.
abstract: 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.
authors.affiliation: Dipartimento di Scienze del Farmaco, Università G. d'Annunzio Via dei Vestini 31, Chieti, Italy.
authors.forename: Guido
authors.initials: G
authors.lastname: Angelini
authors.forename: Paolo
authors.initials: P
authors.lastname: De Maria
authors.forename: Cinzia
authors.initials: C
authors.lastname: Chiappe
authors.forename: Antonella
authors.initials: A
authors.lastname: Fontana
authors.forename: Marco
authors.initials: M
authors.lastname: Pierini
authors.forename: Gabriella
authors.initials: G
authors.lastname: Siani
mesh_terms: D006863:Hydrogen-Ion Concentration; D052578:Ionic Liquids / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D017186:Titrimetry; D014269:Trifluoroacetic Acid
chemical_list: D052578:Ionic Liquids; D011725:Pyridines; D014269:Trifluoroacetic Acid; C023666:pyridine