Reaction of Arabinogalactan Modified by Salicylic and 4-Aminobenzoic Acids with Iodine

The regularities of the reactions in arabinogalactan–salicylic (and/or 4-aminobenzoic) acid–iodine systems in aqueous solutions were studied by spectral methods. The compositions of the complexes and their stability constants were determined and the standard thermodynamic parameters of complex formation (ΔHo, ΔGo, ΔSo) were estimated. It was shown that the modification of arabinogalactan by a drug compound stabilizes the complexes and increases the iodine concentration in them. The synthesized compounds were found to exhibit a high bactericidal activity.