Electrometric study of uranyl(II) and beryllium(II) complexes of 2,2'-dimercapto diethyl ether

Complexation of uranyl(II) and beryllium(II) ions with 2, 2'-dimercapto diethyl ether has been studied in 40% ethanolic media by potentiometric and conductometric titration techniques revealing the formation of 1:1 complex in both the cases. The stability constants of the complexes have been determined at ionic strength μ=0.1 M (NaClO4) by applying Calvin and Melchiors extension of Bjerrum's method. Log Ksub(stab) values are found to be 12.60, 11.96 at 25deg and 12.55, 11.90 at 35deg respectively. The values of ΔG, ΔH and ΔS for the complexation reactions determined at 25deg are also reported. (author)