Transmetallation of Bis(6‐diphenylphosphinoacenaphth‐5‐yl)‐Mercury and ‐Tributyltin with Precious Metal Chlorides

Abstract

The reaction of bis(6‐diphenylphosphinoacenapht‐5yl)mercury, (6‐Ph2P‐Ace‐5‐)2Hg, with [(CO)2RhCl]2 and PtCl2 proceeded with extrusion of mercury / mercury(I) chloride and provided the octahedral rhodium and platinum complexes (6‐Ph2P‐Ace‐5‐)2Rh(CO)Cl and (6‐Ph2P‐Ace‐5‐)2PtCl2, respectively. The reaction of the (6‐diphenylphosphinoacenapht‐5yl)stannane 6‐Ph2P‐Ace‐5‐SnBu3 with PdCl2 gave rise to tributyltin chloride and a dimeric arylpalladium chloride [(6‐Ph2P‐Ace‐5‐)PdCl]2 with a planar Pd2Cl2 core. Together with the previously known gold(III) complex cis‐ and trans‐[R2Au][Cl], the newly prepared compounds were investigated by DFT calculations. The fully optimized gas‐phase structure of [(6‐Ph2P‐Ace‐5‐)PdCl]2 gives rise to a bend Pd2Cl2 core featuring a Pd···Pd palladophilic interaction. The bonding situation was studied using a set of real‐space bonding indicators (RSBIs) derived from the methods Atoms‐In‐Molecules (AIM), Electron Localizability Indicator (ELI‐D) and Non‐Covalent Interaction (NCI) index.