Electromigration of Carrier-Free Radionuclides. 6. Iodide and Bromide Complexes of Carrier-Free 201Tl(I) in Aqueous Solutions

Abstract

Individual ion mobility of 201Tl(I) = +7.3 (3) X 10−4 cm3 s−1 V−1 was observed at 298.1 ± 0.1 K in aqueous solutions of H(K)ClO4, 1.5 · 10−3 ≦ μ ≦ 0.5 and 0.3 ≦ pH ≦ 6.5. Experimental dependences of 201Tl(I) overall ion mobilities on concentrations of ligand anions in solutions of perchlorate background electrolytes have been used to calculate stability constants of neutral thallium complexes Tl I and Tl Br at 298.1 ± 0.1 K and μ = 0.1. They are 115 ± 25 l · mol−1, and 5.25 ± 0.35 l · mol−1 respectively.