Novel heterotrimetallic polyhydrido complexes containing ruthenium and group 6 metals, (Cp‘Ru)2(Cp‘M)(μ-H)5
(4, M = Mo; 5, M = W) and (Cp‘Ru)(Cp‘W)2(H)7 (6), have
been synthesized by the reaction of dimeric ruthenium methoxo
complex (Cp‘RuOMe)2 (3) with dinuclear polyhydrido complexes
Cp‘Ru(μ-H)3MH3Cp‘ (1, M = Mo; 2, M = W) and (Cp‘WH4)2,
respectively. The 1H NMR spectra of 6 exhibit fluxionality
stemming from the dynamic motion of the RuW2 core associated
with exchange of the coordination sites among the hydrido
ligands.