New examples of chelating triketone-like ligands that promote formation of binuclear complexes

The protolytic properties of 2-hydroxy-2-(trifluoromethyl)chroman-4-one, 2-hydroxy-6-methyl-2-(trifluoromethyl)chroman-4-one and 2-hydroxy-2,6-bis(trifluoromethyl)chroman-4-one have been studied. The substituted chroman-4-ones were used as pre-ligands in study of binding properties of triketone-like ligands with Cu(II), Ni(II) and Co(II) in solution. Mononuclear and binuclear complexes of the studied compounds with copper(II) were synthesized.63