35004-54-7Relevant academic research and scientific papers
Formation of Iron-Fluorophosphorane Complexes (η5-C5H5)(CO)LFe{P(OPh)nF 4-n} (L = CO, P(OPh)3; n = 0, 1) and (η5-C5H5)(CO)2Fe{P(OC 6H4NMe)F2}. Nucleophilic Attack of F- toward a Trivalent Phosphorus Atom Coordinated to a Transition Metal
Kubo, Kazuyuki,Bansho, Kumiko,Nakazawa, Hiroshi,Miyoshi, Katsuhiko
, p. 4311 - 4316 (1999)
The reaction of a phosphite complex, [Cp(CO)2Fe{P(OPh)3}]PF6, with Et4NF in CH2CI2 at room temperature yielded a mixture of metallafluorophosphoranes, Cp(CO)2Fe(PF4) (1) and Cp(CO)2Fe{P(OPh)F3} (2). Similar phosphite complexes [Cp(CO)Fe{P(OPh)3}2]PF6 and [Cp(CO)2Fe(P(OC6H4NMe)(OC6H 4NMeH)}]PF6 also reacted with F- to form CpCCO){P(OPh)3}- Fe(PF4) (3) and Cp(CO)2Fe{P(Oc6H4NMe)F2} (4), respectively. The 31P and 19F NMR studies of these metallafluorophosphoranes revealed that pseudorotation around the hypervalent phosphorus center takes place readily in 1 and 3, whereas it marginally occurs at room temperature in 4, but not in 2 even at elevated temperature. The difference in the energy barrier of the rotation process was interpreted in terms of the apicophilicity of the substituents on the phosphorane phosphorus.
