Synthesis and structure of lanthanide complexes with large-bite diphosphine dioxide ligands

► Lanthanide chelate and polymeric complexes with large-bite ligands. ► Flexible ligands yield molecular chelates while a rigid ligand gives a polymer. ► Bis(diphenylphosphoryl)ferrocene undergoes oxidation to tetrachloroferrate anion. ► Structural and thermogravimetric study.