Abstract
Synergic extraction of Co 2+ with thenoyltrifluoroacetone and eight different amines in chloroform was investigated. It is found that the extracted adducts have the general formula Co(TTA) 2 ·B, where B stands for the amine. The stability sequence of the adducts obtained as related to the different classes of benzylamines is; dibenzylamine > benzylamine ⩽ tribenzylamine. A linear decrease in log β with the increase of Taft inductive constant was obtained on using tertiary long chain alkylamines as synergic ligand. UV and IR spectroscopic investigations support the direct bonding of the amine to the metal.
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