Water-catalyzed iron-molybdenum carbyne formation in bimetallic acetylene transformation

Xiaofang Zhai, Minghui Xue, Qiuting Zhao, Qiucui Zheng, Datong Song (), Chen-Ho Tung and Wenguang Wang ()
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Xiaofang Zhai: Beijing Normal University
Minghui Xue: Shandong University
Qiuting Zhao: Beijing Normal University
Qiucui Zheng: Beijing Normal University
Datong Song: University of Toronto
Chen-Ho Tung: Shandong University
Wenguang Wang: Beijing Normal University

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract Transition metal carbyne complexes are of fundamental importance in carbon-carbon bond formation, alkyne metathesis, and alkyne coupling reactions. Most reported iron carbyne complexes are stabilized by incorporating heteroatoms. Here we show the synthesis of bioinspired FeMo heterobimetallic carbyne complexes by the conversion of C2H2 through a diverse series of intermediates. Key reactions discovered include the reduction of a μ-η2:η2-C2H2 ligand with a hydride to produce a vinyl ligand (μ-η1:η2-CH = CH2), tautomerization of the vinyl ligand to a carbyne (μ-CCH3), and protonation of either the vinyl or the carbyne compound to form a hydrido carbyne heterobimetallic complex. Mechanistic studies unveil the pivotal role of H2O as a proton shuttle, facilitating the proton transfer that converts the vinyl group to a bridging carbyne.

Date: 2024
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DOI: 10.1038/s41467-024-52116-9

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