A tetra(pyrid-2-yl)-pyrazine-bridged cyclometalated diosmium complex 1(PF6)2with two distal redoxactive organic amine substituents has been synthesized and characterized. This complex displays four consecutive and separated anodic redox waves at +0.24, +0.38, +0.64, and +0.71 V vs. Ag/Ag Cl. Upon stepwise oxidation, four-step absorption spectral changes in the visible to near-infrared region have been observed. The different redox states of 1(12+through 16+) can be distinguished by the significantly different absorption spectra in the visible and near-infrared region. DFT calculations of 13+show that the spin is delocalized on both osmium–amine components. A tetra (pyrid-2-yl) -pyrazine-bridged cyclometalated diosmium complex 1 (PF6) 2 with two distal redoxactive organic amine has been synthesized and characterized. This complex displays four consecutive and separated anodic redox waves at +0.24, +0.38, +0.64, and +0.71 V vs. Ag / Ag Cl. Upon stepwise oxidation, four-step absorption spectral changes in the visible to near-infrared region have been observed. The different redox states of 1 (12 + through 16+) can be distinguished by the significantly different absorption spectra in the visible and near-infrared region. DFT calculations of 13 + show that the spin is delocalized on both osmium-amine components.