Comparison of complex formation by thallium(I) and potassium salts of potentially chelating anions

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Abstract
Potassium and thallium salts, K(L) and Tl(L), have been prepared from the following acids H(L) where (L) is a potentially bidentate ligand : 8-hydroxyquinoline, H(1), isonitrosoacetophenone, H(2), 1-nitroso-2-naphthol, H(3), 2-nitrophenol, H(4), 2-aminobenzoic acid, H(5), 2,4-dinitrophenol, H(6), 2-hydroxybenzoic acid, H(7), and 2-nitrobenzoic acid, H(8). The thallium compounds, except Tl(6) have low conductivities in N-methylpyrrolidone. Addition of acids H(L′) to the potassium salts K(L) gave the following new adducts K(6),H(7), K(3),2H(1), K(5),2H(1), K(6),2H(3), and K(8),2H(3). No corresponding thallium adducts Tl(L),H(L′) could be obtained. With 2,2′-bipyridyl a 1 : 1 adduct was obtained only with Tl(6). On addition to the corresponding metal salts 1,10-phenanthroline, phen, yielded Tl(4),phen, Tl(5),phen, Tl(6),phen, Tl(7),phen, Tl(8),phen, and K(7),2phen,-2H2O. 2,9-Dimethyl-1,10-phenanthroline, dmphen, on addition to the metal salts, gave Tl(5),dmphen, Tl(6),dmphen, Tl(7),dmphen, Tl(8),dmphen, K(5),dmphen, and K(7),dmphen.

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