dc.contributor.author | Nicolás Utrilla, María Pilar | |
dc.contributor.author | Royo Gracia, Pascual | |
dc.date.accessioned | 2009-10-02T07:37:21Z | |
dc.date.available | 2009-10-02T07:37:21Z | |
dc.date.issued | 2005 | |
dc.identifier.bibliographicCitation | Inorganica Chimica Acta, 2005, v. 358, p. 1494-1500 | en |
dc.identifier.issn | 0020-1693 | |
dc.identifier.uri | http://hdl.handle.net/10017/4177 | |
dc.description.abstract | Reaction of the disilylcyclopentadiene 1,1-[SiMe2(CH2CHdouble bond; length as m-dashCH2)]2C5H4 with NbCl5 gave the new allylsilyl-substituted monocyclopentadienyl niobium complex [Nb{η5-C5H4SiMe2(CH2CHdouble bond; length as m-dashCH2)}Cl4]. This compound was reacted with LiNHtBu or NH2tBu to give the imido derivative [Nb{η5-C5H4SiMe2(CH2CHdouble bond; length as m-dashCH2)}(NtBu)Cl2], which was further alkylated to the imido alkyl complexes [Nb{η5-C5H4SiMe2(CH2CHdouble bond; length as m-dashCH2)}(NtBu)R2] (R = Me, CH2Ph) and [Nb{η5-C5H4SiMe2(CH2CHdouble bond; length as m-dashCH2)}(NtBu)Cl (CH2Ph)]. Reaction of the imido complexes with the corresponding lithium cyclopentadienides gave the dicyclopentadienyl-imido complexes [M(η5-C5R5){η5-C5H4SiMe2(CH2CHdouble bond; length as m-dashCH2)}(NtBu)Cl] (M = Nb, Ta; R = H, Me). Metallocene dichlorides [M(η5-C5R5){η5-C5H4SiMe2(CH2CHdouble bond; length as m-dashCH2)}Cl2] (M = Nb, Ta; R = H, Me) were easily prepared by reduction with Na/Hg and simultaneous transmetallation of [Ta(η5-C5R5)Cl4] with Li[C5H4SiMe2(CH2CHdouble bond; length as m-dashCH2)] and of [Nb{η5-C5H4SiMe2(CH2CHdouble bond; length as m-dashCH2)}Cl4] with Li(C5R5). All of the new compounds have been characterized by elemental analysis, and IR and NMR spectroscopy. | en |
dc.description.sponsorship | Financial support of our work by MCyT (Project MAT2001-1309) is gratefully acknowledged. | en |
dc.format.mimetype | application/pdf | en |
dc.language.iso | eng | en |
dc.publisher | Elsevier | en |
dc.rights | (c) Elsevier, 2005 | en |
dc.subject | Niobium | en |
dc.subject | Tantalum | en |
dc.subject | Imido | en |
dc.subject | Cyclopentadienyl | en |
dc.title | Synthesis and characterization of η5-cyclopentadienyl-silylallyl niobium and tantalum complexes | 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/10.1016/j.ica.2004.09.017 | |
dc.type.version | info:eu-repo/semantics/publishedVersion | en |
dc.identifier.doi | 10.1016/j.ica.2004.09.017 | |
dc.relation.projectID | MAT2001-1309 (Ministerio de Ciencia y Tecnología) | |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | en |