REACTIONS OF [CP(STAR)RUOME]2 .11. EXCHANGE WITH THIOLS AND MOLECULAR-STRUCTURE OF [C5ME4ETRUSET]2

Complexes [Cp*RuSR]2 and [Cp RuSR]2, where Cp* = eta(5)-C5Me5, Cp = eta(5)-C5Me4Et, R = Et, tBu, (tBuO)3Si, are synthesized by exchange of the methoxo groups in [Cp*RuOMe]2 with the respective thiols. An X-ray molecular structure determination of [Cp RuSEt]2 confirms the dimeric structure with co-ordinatively unsaturated 16 VE Ru. The molecular geometry of the thiol-bridged dimer is compared to that of the oxo analogue.