To　investigate　how　the　electronic　effect　of　ligand　at　donor　site　influences　electronic　communication　or　metal-to-metal　charge　transfer　(MMCT)　properties　in　similar　mixed-valence　(MV)　complexes,　a　series　of　binuclear　organometallic　complexes,　MeCp(dppe)RuCNFeCl3　(1),　MeCp(PPh3)(2)RuCNFeCl3　(2),　Cp*(dppe)FeCNFeCl3　(3),　Cp*(dppe)RuCNFeCl3　(4),　and　Cp*(PPh3)(2)RuCNFeCl3　(5),　have　been　synthesized　and　characterized.　The　electronic　absorptions　of　these　complexes　show　the　presence　of　MMCT　properties　between　Ru-II　or　Fe-II　and　Fe-III　inos,　strongly　supported　by　the　theoretical　calculations.　With　increasing　electron-donating　ability　of　ligands　(PPh3　＞　dppe,　Cp*　＞　MeCp)　at　donor　site,　the　MMCT　absorption　bands　are　red-shiftted,　which　expresses　in　the　sequence　of　absorption　bands　with　1　(500　nm),　4　(536　nm),　2　(580　nm),　from　high-energy　to　low-energy.　Meanwhile,　the　MMCT　absorption　energy　of　4　(536　nm),　is　larger　than　of　3　(760　nm),　due　to　the　stronger　electron-donating　ability　of　Fe-II　than　Ru-II.　Furthermore,　these　complexes　belong　to　the　Class　II　systems　according　to　the　Robin　and　Day＇s　classification.