Stable palladium(0) and palladium(II) complexes containing a new, multifunctional and semi-labile phosphorus–bisnitrogen ligand

Abstract

The new, multifunctional, semi-labile phosphorus–bisnitrogen ligand N-(2-diphenylphosphinobenzylidene)-2-(2-pyridyl)ethylamine, PNN, stabilises methyl(chloro)-, η¹-ally(chloro)-, dichloro- and bis(tetrafluoroborate)-palladium(II) PNN complexes in a terdentate coordination fashion, resulting in ionic palladium complexes, as well as an unprecedented palladium(0) PNN complex as is evidenced from ¹H, ¹³C, ³¹P and ¹⁵N NMR spectra and an X-ray structural analysis of [(PNN)PdMe]⁺[Cl]^–.