U. Avciata et al., SYNTHESIS OF BIS[(4,10-DIAZA-4,10-DITOSYL-BENZO-12-CROWN-4) 4'-YL] DIAMINOGLYOXIME AND ITS COMPLEXES, Journal of inclusion phenomena and molecular recognition in chemistry, 26(1-3), 1996, pp. 27-38
A new macrocyclic ligand (HL) has been synthesised by reaction of 4'-a
mino-4, 10-diaza-4, 10-ditosyl-benzo-12-crown-4 with 1, 2-dichloroetha
nedial-dioxime. Protonation constants of the ligand and overall format
ion constants have been calculated from potentiometric data using the
program TITFIT. Both amino and hydroxyimino groups provide donor atoms
together with hydroxyl ions at higher pH values. The order of formati
on constants of the mononuclear complexes are U(VI)O-2 > Cu(II) > Ni(I
I) = Co(II) > Cd(II).