Abstract
The water-soluble cobalt(II) tetradentate Schiff base complex [Co(II)L](ClO 4) 2, L: ( N, N′-bis{5-[(triphenylphosphonium)-methyl]salicylidine}- o-phenylenediamineperchlorate has been synthesized and characterized. This complex forms charge transfer (CT) complexes with imidazole and 1-methylimidazole. The formation constant, molar absorptivity ( ɛ′), and thermodynamic parameters for charge transfer complexes formation of cobalt(II) Schiff base complexes with imidazole derivatives were determined by using UV–vis spectrophotometric method in aqueous solutions at constant ionic strength ( I = 0.2 mol dm −3 KNO 3) at pH 6.0 and various temperatures between 292 and 315 K.
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