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Therefore, an immediate question arises: in transition-metal nanoparticles stabilized by the self-assembly of 1-alkynes, will such a dynamic equilibrium also exist at the metal−ligand interface? This was addressed in the present study by taking advantage of the specific reactivity of metal−vinylidene complexes with imine derivatives to produce heterocyclic azetidinylidene complexes (in fact, this is the method of choice for identifying metal−vinylidene linkages in organometallic complexes).Ruthenium nanoparticles stabilized by acetylide derivatives were used as a comparative example. Because of the lack of ¬®C−H protons, no Ru−vinylidene bond would be anticipated to form at the nanoparticle interface, and thus, no reacitivity with imine derivatives should be observed. |
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