Evidence from the photoelectron spectra of some mercury(II) compounds for the involvement of the inner 5d electrons in covalent bonding
Abstract
Structure corresponding to ionisation of the inner 5d electrons, observed in the He-I photoelectron spectra of HgMe2, MeHgCN, and Hg(CN)2, provides evidence for dπ→π* back-donation in the Hg–CN bond; dz2–s hybridisation is apparently not a strong effect.