MacroInorganics 8. Chelation of copper(II) ion with some new poly(amido- amine)s

The effect on Cu(ll) complexing ability of the number (n) of methylenic groups between aminic nitrogens has been studied for two classes of poly (amido-amines). In order to better elucidate the mechanism of complex formation, low molecular weight models of the polymers have also been studied. The complexing abilities of polymers and models are very similar and decrease by increasing n. Indeed compounds with n = 4 fail to form complexes in aqueous solution. Some viscosimetric titrations have been performed in order to ascertain possible conformational transitions upon complexation. © 1982