CO2 cleavage by tantalum/M (M = iridium, osmium) heterobimetallic complexes

CO2 cleavage by tantalum/M (M = iridium, osmium) heterobimetallic complexes

A novel Ta/Os heterobimetallic complex, [Ta(CH2tBu)3(μ-H)2OsCp*], 2, is prepared by protonolysis of Ta(CHtBu)(CH2tBu)3 with Cp*OsH5. Treatment of 2 and its iridium analogue [Ta(CH2tBu)3(μ-H)2IrCp*], 1, with CO2 under mild conditions reveal the efficient cleavage of CO2, driven by the formation of a...

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Veröffentlicht in:Chemical communications (Cambridge, England) England), 2024, Vol.60 (61), p.7878-7881
Hauptverfasser: Lachguar, Abdelhak, Ye, Christopher Z, Kelly, Sheridon N, Jeanneau, Erwann, del Rosal, Iker, Maron, Laurent, Veyre, Laurent, Thieuleux, Chloé, Arnold, John, Camp, Clément
Format: Artikel
Sprache:eng
Schlagworte:
Chemical Sciences
Coordination chemistry
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Zusammenfassung:A novel Ta/Os heterobimetallic complex, [Ta(CH2tBu)3(μ-H)2OsCp*], 2, is prepared by protonolysis of Ta(CHtBu)(CH2tBu)3 with Cp*OsH5. Treatment of 2 and its iridium analogue [Ta(CH2tBu)3(μ-H)2IrCp*], 1, with CO2 under mild conditions reveal the efficient cleavage of CO2, driven by the formation of a tantalum oxo species in conjunction with CO transfer to the osmium or iridium fragments, to form Cp*Ir(CO)H2 and Cp*Os(CO)H3, respectively. This bimetallic reactivity diverges from more classical CO2 insertion into metal–X (X = metal, hydride, alkyl) bonds.
ISSN:1359-7345
1364-548X
DOI:10.1039/D4CC02207F