Original scientific paper

Syntheses and Spectrophotometric Studies of Some New Aralkyl Pyridinium Oximes

V. Hankonyi ; Department of Chemistry and Biochemistry, Facuity of Medicine, University of Zagreb
Z. Binenfeld ; Department of Chemistry and Biochemistry, Facuity of Medicine, University of Zagreb
V. Karas-Gašparec ; Department of Chemistry and Biochemistry, Facuity of Medicine, University of Zagreb

Abstract

Syntheses and some physical properties of seven aralkyl
pyridinium oximes, potential antidotes against organophosphorus
poisons and potential reagents for pentacyano compounds of iron,
are described and discussed. Their UV absorption spectra in water
and in water-dioxane solutions at different pH values have been
measured. The spectral changes with changing pH in aqueous
solutions are attributed to the dissociati.on of individual functional
groups of the compounds, and in water-dioxane mixtures they are
attributed to the polarities of the solvents. One equilibrium is
established in most of the compounds, however, in PhPA-4 and
PhOPA-4 two equilibria exist. The dissociation constants of all
compounds have been determined spectrophotometrically. The pK's
of the compounds are discussed in terms of the structure of the
compounds. A spectrophotometric method for the determination
of the examined compounds is proposed.

Keywords

Hrčak ID:

197206

URI

https://hrcak.srce.hr/197206

Publication date:

10.11.1972.

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