Insertion of the PC-functionality of (pentamethylcyclopentadienyl)(dicarbonyl)[1,3,3-tris(trimethylsilyl)–η ¹ -1,2-diphosphaallyl]iron into a C ₅ Me ₅ C–H bond: formation of a chelating (η ¹ -P, η ⁵ -C ₅ )-3-tetramethylcyclopentadienyl-1,2-diphosphapropanido Ligand

Heating a methylcyclohexane solution of [(η5-C5Me5)(CO)2Fe–P(SiMe3)–PC(SiMe3)2]1 gives rise to the insertion of the PC-moiety into the CH-bond of a ring methyl group forming the chelate complex {η5-C5Me4CH2P[CH(SiMe3)2]P(SiMe3)Fe(CO)2}5 which is trapped by (Z-cyclooctene)Cr(CO)5 and fully characterized as its Cr(CO)5 adduct 6.