Monohydrido-bridged carbonyl complexes of early transition metals, containing the η 5C 5H 5Nb(CO) 3 moiety

Abstract

[(Ph 2P)N][CpNb(CO) 3H] has been made and shown to react with {M}THF (M = CpV/Nb(CO) 3, Cr/Mo/W(CO) 5 and C 5H 4RMn(CO) 2 (R = H, Me)) to yield the dinuclear, hydride-bridged complexes [(Ph 2P) 2N][CpNb(CO) 3(μ-H){M}]. Spectroscopic characteristics are consistent with a bent NbHM linkage (closed three-centre bond). In some cases ({M} = Cr/W(CO) 5, CpMn(CO) 2), the homo-dinuclear complexes [{M} 2-μ-H] − are also formed.