COPPER-(I) AND COPPER-(II) COMPLEXES WITH TERTIARY LINEAR POLYAMINES OF THE TYPE ME(2)NCH(2)(CH(2)NMECH(2))(N)CH(2)NME(2) (N=1-4)

2,5,8,11-Tetramthyl-2,5,8,11-tetraazadodecane, 11,14-pentamethyl-2,5,8 ,11,14-pentaazapentadecane, and 14,17-hexamethyl-2,5,8,11,14,17-hexaaz aoctadecane, form stable complexes with Cu-I in aqueous solutions. On the other hand 2,5,8-trimethyl-2,5,8-triazanonane, does not. This indi cates that the stabilization of Cu-I by tertiary amine ligands in aque ous solutions requires at least four nitrogens. The electronic spectra and the electrochemical properties of the [CuL(i)](2+) complexes over a wide pH range were studied and potentiometric titrations were made of solutions containing equimolar concentrations of Cu-II and L(i). Th e nature of the complexes present in these solutions is discussed.