Pentamethylcyclopentadienyl Osmium Chemistry: An Approach to Transition Metal Alkane Complexes
Protonation of $\rm(C\sb5Me\sb5)Os(PMe\sb3)\sb2Me$ with $\rm HBF\sb4{\cdot}Et\sb2O$ at room temperature affords the Os$\sp{\rm IV}$ alkyl hydride complex $\lbrack\rm(C\sb5Me\sb5)Os(PMe\sb3)\sb2Me(H)\rbrack\lbrack BF\sb4\rbrack.$ Protonation of $\rm(C\sb5Me\sb5)Os(dmpm)Me$ at ${-}120\sp\circ$C with H2C(SO2CF3)2 in CDFC12 generates the cis methyl/hydride compound $\lbrack\rm(C\sb5Me\sb5)Os(dmpm)Me(H)\sp+\rbrack.$.
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