Ligands containing elements of Group 6B. Part VII. Comparison of the donor properties of some dicarboxylic acids of sulphur, selenium, and tellurium towards silver(I) and some bivalent metal lons

Abstract

The ligands X(CH2CH2CO2H)2(X = O, S, Se, and Te), Se(CH2CO2H)2, X[CH(Me)CO2H]2(X = S or Se), and HO2CCH2SCH2CH2CO2H have been synthesised and the formation constants of their complexes with H+, Ag+, and a number of bivalent metal ions measured potentiometrically at 25 °C and I= 0.10M(K[NO3]). With Ag+ the stability order is Te > Se > S O.