Facile pyramidal inversion at phosphorus in [R3EP7W(CO)3]2− type complexes: An EXSY NMR study

The [R3EP7W(CO)3]2− complexes where E = C, Si, Ge, Sn, Pb show inversion at P(1) with room-temperature rate constants that span more than 2 orders of magnitude. 31P EXSY NMR analysis was implemented to evaluate the kinetic parameters from the highly second-order 31P NMR spin systems.