Transition Metal Carbide Complexes.
Chem Rev
; 122(1): 830-902, 2022 01 12.
Article
en En
| MEDLINE
| ID: mdl-34797626
Carbide complexes remain a rare class of molecules. Their paucity does not reflect exceptional instability but is rather due to the generally narrow scope of synthetic procedures for constructing carbide complexes. The preparation of carbide complexes typically revolves around generating LnM-CEx fragments, followed by cleavage of the C-E bonds of the coordinated carbon-based ligands (the alternative being direct C atom transfer). Prime examples involve deoxygenation of carbonyl ligands and deprotonation of methyl ligands, but several other p-block fragments can be cleaved off to afford carbide ligands. This Review outlines synthetic strategies toward terminal carbide complexes, bridging carbide complexes, as well as carbide-carbonyl cluster complexes. It then surveys the reactivity of carbide complexes, covering stoichiometric reactions where the carbide ligands act as C1 reagents, engage in cross-coupling reactions, and enact Fischer-Tropsch-like chemistry; in addition, we discuss carbide complexes in the context of catalysis. Finally, we examine spectroscopic features of carbide complexes, which helps to establish the presence of the carbide functionality and address its electronic structure.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Elementos de Transición
/
Complejos de Coordinación
Idioma:
En
Revista:
Chem Rev
Año:
2022
Tipo del documento:
Article
País de afiliación:
Dinamarca