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dc.contributor.authorNicolás Utrilla, María Pilar
dc.contributor.authorRoyo Gracia, Pascual 
dc.contributor.authorGalakhov, Mikhail V.
dc.contributor.authorBlacque, Olivier
dc.contributor.authorJacobsen, Heiko
dc.contributor.authorBerke, Heinz
dc.identifier.bibliographicCitationDalton Transactions, 2004, n. 18, p. 2943-2951en
dc.description.abstractGroup 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.sponsorshipThe authors acknowledge MCyT (project MAT2001-1309), the Funds of the University of Zürich and COST (project COST-D12/0016/98) for financial supporten
dc.publisherThe Royal Society of Chemistryen
dc.rights(c) The Royal Society of Chemistry, 2004en
dc.subjectAlkyl–η2-alkene nioboceneen
dc.subjectAllyldimethylsilyl-η5-cyclopentadienyl liganden
dc.titleAlkyl-η2-alkene niobocene and tantalocene complexes with the allyldimethylsilyl-η5-cyclopentadienyl ligand: synthesis, NMR studies and DFT calculationsen
dc.subject.ecienciaQuímica inorgánicaes_ES
dc.subject.ecienciaChemistry, inorganicen
dc.contributor.affiliationUniversidad de Alcalá. Departamento de Química Inorgánica
dc.relation.projectIDMAT2001-1309 (Ministerio de Ciencia y Tecnología)
dc.relation.projectIDCOST-D12/0016/98 (University of Zürich and COST)

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