Synthesis, and spectral and X-ray structural studies of a novel delocalised diphosphazene (CF3)2PNPPh3 and the iron carbonyl complexes [Fe(CO)4{(CF3)2PNPPh3}] and [Fe(CO)3{(CF3)2PNPPh3}2]

Abstract

The diphosphazene (CF₃)₂PNPPh₃ L prepared from the reaction of (CF₃)₂PN₃ with PPh₃ has been shown from a single-crystal X-ray structural study to possess an unusual and novel delocalised PNP moiety containing P^IV and P^V atoms; the PNP structure is retained upon coordination to Fe in the complexes [Fe(CO)₄{(CF₃)₂PNPPh₃}]1 and [Fe(CO)₃{(CF₃)₂PNPPh₃}₂]2.