η2-Iminoacyl and η2-acyl monocyclopentadienyl tantalum complexes bearing oxo and oxo-borane ligands
Alkyl-chloro ligand exchange by the reaction of [TaCp*R2{O·B(C6F5)3}] (R = CH2Ph, Me) with Ph3CCl gave the monoalkyl compounds [TaCp*RCl{O·B(C6F5)3}] (R = CH2Ph, Me). Insertion of CNAr (Ar = 2,6-Me2C6H3) and CO into a Ta–C bond of the mono- and dialkyl complexes gave the iminoacyl compounds [TaCp*X{...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2006 |
| País: | España |
| Institución: | Universidad de Alcalá (UAH) |
| Repositorio: | e_Buah Biblioteca Digital Universidad de Alcalá |
| Idioma: | inglés |
| OAI Identifier: | oai:ebuah.uah.es:10017/4184 |
| Acceso en línea: | http://hdl.handle.net/10017/4184 https://dx.doi.org/10.1002/ejic.200500643 |
| Access Level: | acceso abierto |
| Palabra clave: | Tantalum Oxo ligands Insertion reactions Isocyanide Carbon monoxide Ciencia Química inorgánica Science Chemistry, inorganic |
| Sumario: | Alkyl-chloro ligand exchange by the reaction of [TaCp*R2{O·B(C6F5)3}] (R = CH2Ph, Me) with Ph3CCl gave the monoalkyl compounds [TaCp*RCl{O·B(C6F5)3}] (R = CH2Ph, Me). Insertion of CNAr (Ar = 2,6-Me2C6H3) and CO into a Ta–C bond of the mono- and dialkyl complexes gave the iminoacyl compounds [TaCp*X{η2-C(R)=NAr}{O·B(C6F5)3}] (X = R = CH2Ph, Me; X = Cl, R = CH2Ph) and the acyl compounds [TaCp*X{η2-C(R)=O}{O·B(C6F5)3}] (X = R = CH2Ph, Me; X = Cl, R = CH2Ph), respectively. The related chloro compound [TaCp*Cl{η2-C(Me)=NAr}{O·B(C6F5)3}] was isolated from the reaction of the oxo derivative [TaCp*Cl{η2-C(Me)=NAr}(O)] with the Lewis acid B(C6F5)3. Addition of CNAr or pyridine to [TaCp*(CH2Ph){η2-C(CH2Ph)=NAr}{O·B(C6F5)3}] afforded the borane-free complex [TaCp*(CH2Ph){η2-C(CH2Ph)=NAr}(O)] and the acid-base adduct L·B(C6F5)3 (L = py, CNAr). The molecular structures of [TaCp*Cl{η2-C(Me)=NAr}{O·B(C6F5)3}] and [TaCp*(CH2Ph){η2-C(CH2Ph)=O}{O·B(C6F5)3}] were obtained from X-ray diffraction studies. |
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