Interaction of hydroperoxopalladium complexes, (TpR)(py)Pd–OOH, with hydroxo-nickel and -cobalt complexes, [(μ-OH)(MTpR′)]2(M = Ni, Co), leading to oxidative dehydrogenation of the saturated hydrocarbyl moiety in the ancillary ligand (TpiPr2)

Treatment of hydroperoxopalladium complexes, (TpR)(py)Pd–OOH, with hydroxonickel complexes, [(μ-OH)NiTpR′]2, when either TpR or TpR′ is TpiPr2, results in dehydrogenation of an isopropyl group of the TpiPr2 ligand to give heterobimetallic di-μ-hydroxo complexes bearing the 3-isopropenyl-substituted Tp ligand [HB(pziPr2)2(pz3-isopropenyl-5-iPr). Similar dehydrogenation is observed for the reaction with the hydroxocobalt complex bearing the TpiPr2 ligand. The dehydrogenated products are characterized by spectroscopic and crystallographic methods and a mechanism involving a heterobimetallic μ-peroxo intermediate formed via dehydrative condensation has been proposed for the oxidative dehydrogenation.