Zinc and Copper Complexes of Methylated Di- and Tetraaminocyclodextrins

Article abstract of DOI:10.1002/ejoc.201801554

The α- and β-cyclodextrins with two dimethylamino groups or two trimethylethylenediamino groups attached to the primary face were synthesized and their pK_a values were determined by potentiometric titration. The complexation of the four cyclodextrin analogues with zinc and copper was studied by NMR and showed one or two cyclodextrins bound to the metal. Inclusion of 4-halophenols in the metal complexes were also studied.