Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/37727
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Título : Acid−Base Reactions of Methylnickel Hydroxo, Alkoxo, and Amide Complexes with Carbon Acids. Studies on the Reactivity of Noncyclic Nickel Enolates
Autor : Cámpora, Juan, Matas, Inmaculada, Palma Ramírez, Pilar, Álvarez, Eleuterio, Graiff, Claudia, Tiripicchio, Antonio
Palabras clave : Hydroxo
Alkoxo
Amido
Carbon acids
Organonickel
Reactivity
Enolate complex
Temperature
Fecha de publicación : 27-Sep-2007
Editor: American Chemical Society
Citación : Organometallics 26(23): 5712-5721 (2007)
Resumen: Basic organonickel hydroxo, alkoxo, or amido complexes of composition Ni(Me)(X)(dippe) (X = OH, t-BuO, cyclo-NC4H8; dippe = i-Pr2PCH2CH2Pi-Pr2) react with enolizable ketones, esters, and nitriles, producing the corresponding enolate complexes. In the case of the hydroxo and alkoxo complexes, these reactions may lead to equilibrium mixtures, allowing a comparison of their respective basicities, while the amido compound reacts clean and quantitatively in all cases, allowing the isolation of the corresponding enolates. While the ketone derivatives display oxygen-bound enolate ligands, the ester and nitrile enolates bind the metal center through the carbon atom. The acetophenone enolate complex has strong nucleophilic properties and rapidly reacts with aldehydes (PhCHO) or CO2, affording the corresponding aldolate and carboxylate addition products.
Descripción : 10 páginas, 3 figuras, 2 tablas, 8 esquemas.
Versión del editor: http://dx.doi.org/10.1021/om7007259
URI : http://hdl.handle.net/10261/37727
ISSN: 0276-7333
DOI: 10.1021/om7007259
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