The novel complex trans-Cu(hfac)(2)(TTF-py)(2) (hfac = hexafluoroacetylacetonate; TTF-py = 4-(2-tetrathiafulvalenyl-ethenyl)pyridine) in which the paramagnetic transition metal and the organic donor are covalently linked through a conjugated bridge is synthesized and characterized aiming at a new approach for the occurrence of pi -d interactions in conducting and magnetic molecule-based materials.