Synthesis and reactivity of [(R1R2N)2PH]Fe(CO)4 complexes. X-ray crystal structure of [(Ph2N)2PH]Fe(CO)4

KHFe(CO)4 reacts with tris(amino)phosphines by substitution at phosphorus leading to [bis(amino)phosphine]tetracarbonyliron complexes [(R1R2N)2PH]Fe(CO)4. The X-ray structure has been determined for R1=R2=Ph. Deprotonation of these complexes with KH affords stable potassium phosphidotetracarbonylferrates which can be alkylated or acylated at phosphorus.