Spectrophotometric Studies of the Complexes of Phenylazochromotropic Acid Formed with Thorium
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概要
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The dissociation constant of phenylazochromotropic acid, p<I>K</I><SUB>a</SUB>, has been estimated spectrophotometrically to be 9.3<SUB>0</SUB> (25°C, μ=0.1).<BR>The reagent reacts with thorium in the molar ratio 1:1, displacing one hydrogen atom, and the approximate value of the apparent stability constant of the complex, log<I>K</I>′, has been estimated to be 3.4∼4.9 in the 2∼3.5 pH value range.
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