Abstract
The dinuclear ruthenium tetrahydride [(η5-C5Me5)Ru(μ-H)2]2 reacts with acetonitrile or propionitrile in the presence of an arene such as toluene or naphthalene to generate the (μ-hydrido)(μ-alkylideneamido)ruthenium complex (Cp‘Ru)2(μ-L)(μ-H)(μ-NCHR) (L = (arene); Cp‘ = η5-C5Me5). The reaction of the (μ-alkylideneamido)ruthenium complex with ethylene gives the bis(ethylene)ruthenium complex [Cp‘Ru(η2-CH2CH2)]2(μ-H)(μ-NCHCH3), which undergoes dehydrogenative coupling of the ethylene ligand to yield the μ-η2:η2-s-cis-butadiene complex (Cp‘Ru)2(μ-η2:η2-CH2CHCHCH2)(μ-H)(μ-NCHCH3).
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