dc.contributor.author | Nicolás Utrilla, María Pilar | |
dc.contributor.author | Royo Gracia, Pascual | |
dc.contributor.author | Galakhov, Mikhail V. | |
dc.contributor.author | Blacque, Olivier | |
dc.contributor.author | Jacobsen, Heiko | |
dc.contributor.author | Berke, Heinz | |
dc.date.accessioned | 2009-10-02T09:48:41Z | |
dc.date.available | 2009-10-02T09:48:41Z | |
dc.date.issued | 2004 | |
dc.identifier.bibliographicCitation | Dalton Transactions, 2004, n. 18, p. 2943-2951 | en |
dc.identifier.issn | 1477-9226 | |
dc.identifier.uri | http://hdl.handle.net/10017/4185 | |
dc.description.abstract | Group 5 metal complexes [M(η5-C5H5){η5-C5H4SiMe2(CH2-η2-CH[double bond, length as m-dash]CH2)}X] (M = Nb, X = Me, CH2Ph, CH2SiMe3; M = Ta, X = Me, CH2Ph) and [Ta(η5-C5Me5){η5-C5H4SiMe2(CH2-η2-CH[double bond, length as m-dash]CH2)}X] (X = Cl, Me, CH2Ph, CH2SiMe3) containing a chelating alkene ligand tethered to a cyclopentadienyl ring have been synthesized in high yields by reduction with Na/Hg (X = Cl) and alkylation with reductive elimination (X = alkyl) of the corresponding metal(IV) dichlorides [M(η5-Cp){η5-C5H4SiMe2(CH2CH[double bond, length as m-dash]CH2)}Cl2] (Cp = C5H5, M = Nb, Ta, Cp = C5Me5, M = Ta). These chloro– and alkyl–alkene coordinated complexes react with CO and isocyanides [CNtBu, CN(2,6-Me2C6H3)] to give the ligand-substituted metal(III) compounds [M(η5-Cp){η5-C5H4SiMe2(CH2CH[double bond, length as m-dash]CH2)}XL] (X = Cl, Me, CH2Ph, CH2SiMe3). Reaction of the chloro–alkene tantalum complex with LiNHtBu results in formation of the imido hydride derivative [Ta(η5-C5Me5){η5-C5H4SiMe2(CH2CH[double bond, length as m-dash]CH2)}H(NtBu)]. NMR studies for all of the new compounds and DFT calculations for the alkene-coordinated metal complexes are compared with those known for related group 4 metal cations. | en |
dc.description.sponsorship | The authors acknowledge MCyT (project MAT2001-1309), the Funds of the University of Zürich and COST (project COST-D12/0016/98) for financial support | en |
dc.format.mimetype | application/pdf | en |
dc.language.iso | eng | en |
dc.publisher | The Royal Society of Chemistry | en |
dc.rights | (c) The Royal Society of Chemistry, 2004 | en |
dc.subject | Alkyl–η2-alkene niobocene | en |
dc.subject | Tantalocene | en |
dc.subject | Allyldimethylsilyl-η5-cyclopentadienyl ligand | en |
dc.title | Alkyl-η2-alkene niobocene and tantalocene complexes with the allyldimethylsilyl-η5-cyclopentadienyl ligand: synthesis, NMR studies and DFT calculations | en |
dc.type | info:eu-repo/semantics/article | en |
dc.subject.eciencia | Ciencia | es_ES |
dc.subject.eciencia | Química inorgánica | es_ES |
dc.subject.eciencia | Science | en |
dc.subject.eciencia | Chemistry, inorganic | en |
dc.contributor.affiliation | Universidad de Alcalá. Departamento de Química Inorgánica | |
dc.relation.publisherversion | http://dx.doi.org/10.1039/B406747A | |
dc.type.version | info:eu-repo/semantics/publishedVersion | en |
dc.identifier.doi | 10.1039/B406747A | |
dc.relation.projectID | MAT2001-1309 (Ministerio de Ciencia y Tecnología) | |
dc.relation.projectID | COST-D12/0016/98 (University of Zürich and COST) | |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | en |