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Iron alkynyl(amino)carbene complexes, (β-aminovinyl)carbene complexes, η3-(2-(alkylcarbonyl)vinyl)carbene complexes, and a 3-aminoallenylidene complex were formed in the reactions of iron alkynyl(ethoxy)carbene complexes with amines. The ratio of the products, which were formed by substitution reaction, the Michael addition of amines, rearrangements after the addition reaction, and the addition followed by the elimination of the ethoxy group, respectively, was dependent on reaction temperature, the substituent of the alkynyl moiety, and employed amines.
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