Protonation of maleic and fumaric acid in aqueous sulfuric acid solutions

Journal of the Serbian Chemical Society

关键词: maleic acid;    fumaric acid;    protonation;    spectrophotometry;   

DOI  :  

来源: DOAJ

【 摘 要 】

The protonations of maleic and fumaric acid in an acidic medium (aqueous solutions of sulfuric acid) were followed spectrophotometrically at room temperature. The acid-base equilibria were characterised qualitatively and quantitatively. The pKBH+ values were determined using the Hammett equation, employing several acid functions in order to determine which of them describes best the protonation process of the studied organic acids. The thermodynamicpKBH+ values as well as those of the solvation parameters m, m* and f and of the thermodynamic protonation constants (or, rather, the pKa,p values) were also defermined. The method of characteristic vector analysis (CVA) was used to reconstruct the experimental spectra.

【 授权许可】

Unknown