Synthesis, Raman and NMR spectroscopy of the trimetallic complexes [IrCl(SnCl 3)(HgCl)(CO)(PR 3) 2

Abstract

Synthesis, Raman and NMR studies are presented for the new octahedral trimetallic complexes with composition [IrCl(SnCl 3)(HgCl)(CO)(PR 3) 2], R = p-XC 6H 4; X = H, CH 3O, F, Cl. Only the isomer containing the Cl 3SnIrHgCl fragment and trans phosphine ligands is observed. Force constants for the IrSn and IrHg bonds as well as 31P, 119Sn and 199Hg NMR data are reported. The presence of a spin-spin coupling constant of more than 40,000 Hz between the 199Hg and 119Sn atoms is shown to originate from a two-bond and not a one-bond interaction.