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β-Elimination and insertion of CNR in transient pentamethylcyclopentadienyl-imido-tantalum dialkyl complexes. X-ray structure of [TaCp*{N(2,6-Me2C6H3)}(CH2=CH2)(PMe3)]

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Authors
Royo Gracia, PascualUniversity of Alcalá Author; Sánchez-Nieves Fernández, JavierUniversity of Alcalá Author; Pellinghelli, Maria Angela; Tiripicchio, Antonio
Identifiers
Permanent link (URI): http://hdl.handle.net/10017/4276
DOI: 10.1016/S0022-328X(98)00570-1
ISSN: 0022-328X
Publisher
Elsevier
Date
1998
Affiliation
Universidad de Alcalá. Departamento de Química Inorgánica
Funders
Consiglio Nazionale delle Ricerche (Rome)
Bibliographic citation
Journal of Organometallic Chemistry, 1998, v.563, n.1-2, p.15-21
Keywords
Alkyl
Imido
Iminoacyl
Pentamethylcyclopentadienyl
Tantalum
Project
PB-9201178C (Ministerio de Educación y Cultura)
Document type
info:eu-repo/semantics/article
Version
info:eu-repo/semantics/publishedVersion
Publisher's version
http://www.dx.doi.org/10.1016/S0022-328X(98)00570-1
Rights
© Elsevier, 1998
Access rights
info:eu-repo/semantics/openAccess
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Abstract
The transient dialkyl complexes [TaCp*R2(NAr)] (Cp*=C5Me5; R=Et, n-Pr; Ar=2,6-Me2C6H3), obtained by alkylation of [TaCp*Cl2(NAr)] with two equiv. of RMgCl in diethylether at low temperature, react with one equiv. of PMe3 to give [TaCp*(NAr)(CH2CHR)(PMe3)] (R=H1, Me2) after β-elimination and reductive elimination of alkane. When the same alkylation is carried out and then one equiv. of CN(2,6-Me2C6H3) is added after heating to room temperature, the alkyl iminoacyl insertion products [TaCp*R{η2-CR=N(Ar)}(NAr)] (R=Et3, n-Pr4) are obtained. However when alkylation with one equiv. of MgClR (R=Et, n-Pr, i-Pr) is carried out at ambient temperature after the addition of CN(2,6-Me2C6H3), the chloro iminoacyl complexes [TaCp*Cl{η2-CR=NAr)}(NAr)] (R=Et 5, n-Pr 6, i-Pr 7) are isolated. The structure of [TaCp*(NAr)(CH2=CH2) (PMe3)] (1) has been determined by X-ray diffraction methods.
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