Phenyl-functionalized diiron propanediselenolato complexes containing intramolecular bridging diphosphine ligands

Reactions of (μ-SeCH₂)₂CHC₆H₅]Fe₂(CO)₆ (A) with 1,1′-bis(diphenylphosphino)ferrocene (dppf) or 1,3-bis(diphenylphosphino)propane (dppp) in refluxing xylene yielded (μ-SeCH₂)₂CHC₆H₅]Fe₂(CO)₄(μ-dppf) (1) or (μ-SeCH₂)₂CHC₆H₅]Fe₂(CO)₄(μ-dppp) (2) in moderate yields. The chemical structures of both complexes were characterized by spectroscopic methods and X-ray crystallography, and the electronic structures were further investigated by UV–vis. The redox properties of both complexes in the absence and presence of acetic acid were observed by cyclic voltammetry (CV).