η2-Iminoacyl and η2-acyl monocyclopentadienyl tantalum complexes bearing oxo and oxo-borane ligands
Identifiers
Permanent link (URI): http://hdl.handle.net/10017/4184DOI: 10.1002/ejic.200500643
ISSN: 1099-0682
Publisher
John Wiley & Sons
Date
2006Bibliographic citation
European Journal of Inorganic Chemistry, 2006, n.1, p.127-132
Keywords
Tantalum
Oxo ligands
Insertion reactions
Isocyanide
Carbon monoxide
Project
MAT2004–02614 (Ministerio de Ciencia y Tecnología)
GR/MAT/0622/2004 (Comunidad de Madrid)
Document type
info:eu-repo/semantics/article
Version
info:eu-repo/semantics/publishedVersion
Publisher's version
http://www.dx.doi.org/10.1002/ejic.200500643Rights
© Wiley, 2006
Access rights
info:eu-repo/semantics/openAccess
Abstract
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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