Abstract
Abstract The complexations of magnesium and barium ions in acetonitrile with DMF, DMSO, and HMPA were studied potentiometrically by the use of an organic polymer membrane electrode. The formation constants for 1:1 complexes of magnesium and barium ions, respectively, were 2.1×102 and 19 with DMF, 4.5×102 and 41 with DMSO, and (5.5×103) and 1.6×103 with HMPA. The roles of the basicity of the complexing solvent, crystallographic radius, and charge of the cations are discussed briefly.
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