A novel C-60-Os-3 (carbon-metal) compound with long alkyl chain, Os-3(CO)(8)[(C16H33O)(3)C6H2NC](mu(3)-eta(2):eta(2):eta(2)-C-60) (2), was synthesized by substituted reaction between one CO of Os-3(CO)(9)(mu(3)-eta(2):eta(2):eta(2)-C-60) and (C16H33O)(3)C6H2NC (1). Compound 1 and 2 have been characterized by IR and H-1 NMR. Cyclic voltammetry (CV) and differential scanning calorimetry (DSC) were performed to electrochemical property and phase transition of 2.