Investigation of the CuCl 2 /H 2 Memal/L (H 2 Memal=methylmalonic acid, L=1,10-phenanthroline or 2,2′-bipyridine) reaction system in MeOH and various molar ratios has lead to the isolation of two one-dimensional coordination polymers presenting the [Cu(L)(Memal)] repeating unit (1, L=1,10-phen; 2, L=2,2′-bpy). The Memal 2− ligand adopts the bidentate [chelating]+unidentate coordination mode between the Cu II ions. Magnetic susceptibility measurements on 1 and 2 indicated the existence of weak ferromagnetic intrachain interactions and X-band EPR spectra from powdered samples of 1 and 2 are consistent with the stereochemistry of the Cu II ions and with the presence of weak exchange interactions.