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Título : Synthesis, structure and properties of [1,2,4]triazolo[4,3-a]pyridin-3-ylidene rhodium and palladium complexes
Autor : Iglesias-Sigüenza, Javier, Ros, Abel, Díez, Elena, Alcarazo, Manuel, Álvarez, Eleuterio, Fernández, Rosario, Lassaletta, José M.
Palabras clave : Rhodium
Fecha de publicación : 21-Jul-2009
Editor: Royal Society of Chemistry (Great Britain)
Resumen: The reaction of [1,2,4]triazolo[4,3-a]pyridinium tetrafluoroborates with [RhCl(COD)]2 and [PdCl(allyl)]2 takes place under mild basic conditions (Et3N, THF, room temperature) to afford the corresponding [RhCl(COD)(Tripy)] and [PdCl(allyl)(Tripy)] complexes, respectively (Tripy = [1,2,4]triazolo[4,3-a]pyridin-3-ylidene), and their structures were analysed by X-ray diffractometry and spectroscopic techniques. The σ-donor ability of the new ligands was estimated by comparative analysis of infrared νCO stretching frequencies of [RhCl(CO)2(Tripy)] complexes, and proved to be strongly dependent on the substitution pattern. Additionally, a first insight into the catalytic properties of the latter in the Suzuki–Miyaura cross coupling demonstrates a good catalytic activity that enables the coupling of aryl chlorides at room temperature.
Descripción : 8 páginas, 5 figuras, 2 tablas, 5 esquemas.
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ISSN: 1477-9226
DOI: 10.1039/B907043E
Citación : Dalton Transactions (35) : 7113-7120 (2009)
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