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Acid-Base and Complex-Forming Properties of 2-Dialkylaminomethylphenols with respect to Copper(II) in a Tetrachloromethane-Water Two-Phase System
Authors:Sal'nikov  Yu I  Boos  G A  Ryzhkina  I S  Yusupova  G R
Institution:(1) Kazan State University, Kazan, Tatarstan, Russia;(2) Arbuzov Institute of Organic and Physical Chemistry, Kazan Research Center, Russian Academy of Sciences, Kazan, Tatarstan, Russia
Abstract:The protolytic properties of 2-dialkylaminomethylphenols were characterized by effective partition constants in the tetrachloromethane-water medium at 298 K by means of two-phase potentiometric titration. A correlation was found between the effective partition constant including the dissociation constant of the protonated form of 2-dialkylaminomethylphenol and the pgr constants of the substituents. The partition constants of the compounds were calculated. The formation of 1:1 charged copper(II) complexes in aqueous solution and of 2:1 neutral complexes in the organic phase was revealed. The stability constants of the complexes in aqueous solution and the partition constants of the 2:1 complexes were estimated.
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