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3579034 
Journal Article 
INFLUENCE OF THE DIELECTRIC-CONSTANT IN DIOXANE WATER MEDIA ON THE DISSOCIATION-CONSTANTS OF N-PHENYL-ACETYL-MANDELOHYDROXAMIC ACID 
Ocana, DC; Martinezvidal, JL; Salinas, F 
1990 
Yes 
Annali di Chimica
ISSN: 0003-4592
EISSN: 1612-8877 
80 
9-10 
473-480 
WOS:A1990FC22100008 
The influence of pH upon the absorption spectra of N-phenyl-acetyl-mandelohydroxamic acid (N-PAMHA) in water and dioxane-water mixtures at different ionic strengths has been studied. The pK(a) of N-PAMHA in aqueous medium is 8,35 and the pK(a) values increase when the dielectric constant or the ionic strength of the medium decreases.