We present the syntheses of trigonal planar coordinated Fe(II) carbodiphosphorane (CDP^R) complexes, starting from iron(II)-bis(trimethylsilylamide) [Fe{N(SiMe₃)₂}₂] and hexaphenyl-(CDP^Ph) and sym-dimethyltetraphenyl-carbodiphosphoranes (CDP^Me), respectively. Both complexes [CDP^Ph-Fe{N(SiMe₃)₂}₂] (1) and [CDP^Me-Fe{N(SiMe₃)₂}₂] (2) were examined in solution and in the solid state. 1 shows a dissociation equilibrium in solution which we monitored by variable temperature ¹H-NMR spectroscopy. Magnetic measurements of 1 and 2 yielded a high spin configuration (S = 2) for both complexes. Quantum chemical calculations were performed to analyze the bonding situation in compound 1.