Premium
A comprehensive study on the polarographic behaviour of α‐arylhydrazono‐3‐ketimino‐nitriles
Author(s) -
Ismail M. I.
Publication year - 1991
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280520106
Subject(s) - polarography , electrolysis , chemistry , aqueous solution , ionization energy , redox , electrochemistry , coulomb , computational chemistry , ionization , electrode , electron , inorganic chemistry , organic chemistry , ion , physics , quantum mechanics , electrolyte
The polarographic behaviour of some α‐arylhydrazono‐3‐ketimino‐nitriles (Ia—h) in 50% ethanolic aqueous buffer is reported and discussed. The mechanism of electrode processes corresponding to the observed cathodic waves is proposed and confirmed by the aid of model compounds as well as through identification of controlled potential electrolysis products. The E 1/2 and pKa values of the title compounds were evaluated and correlated to Hammett constants. The physical characteristics of the studied compounds in DMF regarding their redox potential (Δ 1/2 ); electron affinity (EA); ionization potential (IP); electronic transition energy (E CT ) and coulomb repulsion integral (J 12 ) were computed. A linear correlation was shown to exist between Δ 1/2 and E CT .