Trinuclear copper(II) complexes of some aza macrocycles

The syntheses of copper(II) complexes with neutral macrocyclic ligands 1,4,7,10,12,- 15,17,20,23,26,27,30-dodecaazadispiro[10·4·10·4]triacontane (DDST), 2,5,7,10,13,15,18,21,-23,26,29,32-dodecaazatricyclo[20·10·0·0^6,17]dotriacontane (DOCD) and 2,5,7,10,13,16,18,-21,23,26,29,32-dodecaaza-1,6,17,22-tetrachlorotricyclo[20·10·0·0^6,17]dotriacontane (DTTD) derived from triethylenetetramine, 1,2-diaminoethane and chlorocarbons (carbon tetrachloride, 1,l,2,2-tetrachloroethane and hexachloroethane, respectively) have been studied. Complexes [Cu₃(DDST)]Cl₆, [Cu₃(DOCD)]Cl₆ and [Cu₃(DTTD)]Cl₆?·?H₂O and the copper ion-free ligand hydrochlorides DDST?·?12HCl and DOCD?·?12HCl are supported by elemental analyses, conductivity measurements and spectroscopic studies. Potentiometric equilibrium studies on DDST and DOCD hydrochlorides and their copper complexes also support the structures.