A Bis(thiophosphinoyl)methylene Ruthenium Carbene Complex:  Synthesis, X-ray Crystal Structure, and DFT Calculations of Its Thermally Promoted Reverse α-Hydride Migration Process

The synthesis and X-ray crystal structure of a new (S,C,S)-based carbene ruthenium complex (<b>2</b>) are presented. The thermally promoted rearrangement of this new complex to complex <b>3</b> involves a reverse α-hydride migration, which has been investigated by DFT calculations.