Pure TTF Chains in π-d Material made of Paramagnetic Transition Metal Complex Containing TTF as Ligand, [CuII(hfac)2(TTF-py)2](BF4)2.2CH2Cl2 (hfac = hexafluoroacetylacetonate and TTF-py = 4-(2-tetrathiafulvalenyl-ethenyl)pyridine)

The preparation, X-ray crystal structure, EPR and magnetic measurements of [CuII(hfac)2(TTF-py)2](BF4)2.2CH2Cl2, a new material where the conducting and the localized spin systems are covalently linked through conjugated bridges, are reported. This materials is in line with a previous compound [CuII(hfac)2(TTF-py)2](PF6).2CH2Cl2, despite the full oxidation of the TTF-type organic donor ligand, we observed the presence of dimerized TTF chains.