Synthesis, characterization and crystal structures of tetrairon ethanedithiolate complexes containing bridging bidentate phosphine ligands

► We have prepared three tetrairon ethanedithiolate complexes containing bridging bidentate phosphine ligands. ► The new complexes were characterized by elemental analysis, together with IR and NMR spectroscopies. ► Their structures were determined by single crystal X-ray diffraction analysis.