Helium-I photoelectron spectra of tetrakis(trifluorophosphine)-nickel(0), -palladium(0), and -platinum(0)

Abstract

He(I) Photoelectron (p.e.) spectra of the title compounds are reported and discussed. Discrepancies between earlier reports are analysed. The spectra are related to ionisation potential data for the free atoms, free PF₃, and other compounds, and evidence is put forward which suggests that the bonding is strongest for the Pt compound, and that charge shifts from σ- and π-bonding cancel each other in these molecules.