Oxidation-Induced Rearrangement from a <i>nido</i>- to a <i>closo</i>-Ruthenacyclopentadiene

Two-electron oxidation of a triruthenium nido-ruthenacyclopentadiene complex, {Cp*Ru(μ-H)}3(CMeCR−CHCH) (1a; R = H, 1b; R = Me, Cp* = η5-C5Me5), proceeds at −78 °C and exclusively affords a cationic closo-ruthenacyclopentadiene complex, [(Cp*Ru)2{Cp*Ru(CHCMe−CRCH)}(μ-H)2](PF6) (6a; R = H, 6b; R = Me).