Reactions of monocyclopentadienylniobium(III) complexes with α-diketones. Crystal-structure of the phosphonium salt [P{C(OH)MeC(O)Me}Me2Ph]Cl
Autores
Jalón Sotés, Félix Ángel; Gómez Sal, Pilar; Otero Montero, Antonio; Royo Gracia, Pascual; García Blanco, S.; [et al.]Identificadores
Enlace permanente (URI): http://hdl.handle.net/10017/4660DOI: 10.1016/0022-328X(87)85096-9
ISSN: 0022-328X
Editor
Elsevier
Fecha de publicación
1987Cita bibliográfica
Journal of Organometallic Chemistry, 1987, v.332, n.3, p.289-298
Palabras clave
Niobium
Crystal structure
Proyectos
2001-83 (Ministerio de Educación y Ciencia)
Tipo de documento
info:eu-repo/semantics/article
Versión
info:eu-repo/semantics/publishedVersion
Versión del editor
http://dx.doi.org/10.1016/0022-328X(87)85096-9Derechos
© Elsevier, 1987
Derechos de acceso
info:eu-repo/semantics/openAccess
Resumen
The reactions of Nb(η5-C5H5)Cl2(CO)L2 (= PMe3, PMe2Ph) with α-diketones RCOCOR (R = Me, Ph) and 3,5-di-t-butyl-o-quinone have been studied. When L = PMe2Ph and R = Ph the reaction in a molar ratio 1/1 gives Nb(η5-C5H5)Cl2(O2C2Ph2)(PMe2Ph)2 (I) whereas the same reaction for R = Me gives the phosphonium salt [P{C(OH)MeC(O)Me}Me2Ph]Cl (VII). When L = PMe3 only the phosphonium salts [P{C(OH)RC(O)R}Me3]Cl are obtained for R = Me (V) and Ph (VI), but the complex Nb(η5-C5H5)Cl2(O2C2Ph2)PMe3 (II) can be isolated by previous addition of MeI. Similar reactions with 3,5-di-t-butyl-o-quinone give Nb(η5-C5H5)Cl2(o-O2C6H2But)L, L = PMe3 (III), PMe2Ph (IV). All the compounds have been characterized by IR, 1H, 13C, 31P NMR spectroscopy and the crystal structure of VII has been determined by X-ray diffraction. VII crystallizes in the monoclinic space group P21/c with a 7.440(2), b 10.377(3), c 17.644(4) Å, β 96.94(2)° and Dcal 1.039 g cm−3 for Z = 4. A final R value of 0.046 (Rw = 0.049) based on 2309 observed reflections was obtained. The geometry around the P atom is tetrahedral.
Ficheros en el ítem
Ficheros | Tamaño | Formato |
|
---|---|---|---|
70.pdf | 291.1Kb |
|
Ficheros | Tamaño | Formato |
|
---|---|---|---|
70.pdf | 291.1Kb |
|
Colecciones
- QUIMINOR - Artículos [236]