Two metal complexes, [Fe(tppda)(2)](ClO4)(2)center dot acetone (1) and [Co(tppda)(2)](PF6)(2)center dot MeOH (2) were synthesized, and their molecular structures and magnetic properties were also characterized by single-crystal X-ray diffraction analysis and magnetic susceptibility. Both compounds showed that six pyridyl groups of two tppda ligands were coordinated to the central metal ion while the remaining four pyridyl and four tertiary-amine substituents existed without coordination. Additionally, the temperature-dependent magnetic susceptibility of both complexes revealed a gradual spin transition for 1 and high-spin state for 2, respectively.