A　T-shaped　cyanidometal-bridged　tetranuclear　one-electron　oxidized　complex　[{CpFeII(dppe)(CN)}3RuIII(DMPZ)2Cl][PF6]2　(1+,　Cp　=　cyclopentadienyl;　dppe　=　1,2-bis(diphenylphosphino)ethane;　DMPZ　=　2,6-dimethylpyrazine),　which　can　be　considered　as　a　composition　of　cis-　and　trans-configuration　trinuclear　subunits,　was　synthesized　and　well　characterized.　The　FTIR　and　UV-vis-NIR　spectra　of　products　of　1+　with　different　valence　states　were　investigated　by　spectroelectrochemical　measurements　on　an　OTLLE　cell　in　dichloromethane.　(TD)DFT　calculations　were　performed　to　fully　understand　the　metal-to-metal　charge　transfer　(MMCT)　transition　and　delocalization　properties　of　the　T-shaped　cyanidometal-bridged　tetranuclear　complexes.　Spectral　analyses　revealed　a　superior　electronic　delocalization　between　the　terminal　Fe　centers　positioned　in　the　trans-configuration　compared　to　those　in　the　cis-configuration.　Most　importantly,　this　work　shows　the　presence　of　the　oxidation-driven　intramolecular　charge　transfer　from　the　terminal　Fe　center　to　the　central　Ru　center　during　the　change　from　the　two-electron　oxidized　state　(12+)　to　the　three-electron　oxidized　state　(13+),　as　confirmed　by　electrochemistry,　FTIR　and　UV-vis-NIR　spectroscopy,　and　also　strongly　supported　by　theoretical　calculations.　©　2025　The　Royal　Society　of　Chemistry.