Formation of a Six-Membered Metallacycle Consisting of Iron, Carbon, Phosphorus, Boron, and Two Oxygens:  The First Example of Precedence of Migratory Insertion of CO into an M−C Bond over OR Abstraction from Coordinating Phosphite by BF₃

Abstract

Treatment of Cp(CO)MeFe{P(OMe)3} with BF3·OEt2 and then PPh3 gave a six-membered metallacyclic complex, Cp(PPh3)FeC(Me)OBF2OP(OMe)2, which is suggested by its NMR data and X-ray analysis to be best described as a carbene phosphite metallacycle