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Determination spectrophotometrique des constantes d'acidite de quelques 2,1,3-benzoselenadiazoles (piazselenoles)

Authors
Journal
Talanta
0039-9140
Publisher
Elsevier
Publication Date
Volume
26
Issue
1
Identifiers
DOI: 10.1016/0039-9140(79)80147-2
Disciplines
  • Physics

Abstract

Abstract The variation with increasing acidity of the ultraviolet/visible region absorption spectrum of 2,1,3-benzoselenadiazole and five of its derivatives has been studied and the ionization constants were determined by using a new computer method for the correction of the medium effect. An infrared spectroscopic study was also done on these derivatives and the corresponding substituted 1,2-diamino-benzenes. Positive correlations were found between some infrared frequencies and either the values of the ionization constants or the sum of the Hammett substitution constants σ m + σ p.

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