23818-58-8Relevant academic research and scientific papers
Synthesis, structure and properties of [1,2,4]triazolo[4,3-a]pyridin-3- ylidene rhodium and palladium complexes
Iglesias-Sigueenza, Javier,Ros, Abel,Diez, Elena,Alcarazo, Manuel,Alvarez, Eleuterio,Fernandez, Rosario,Lassaletta, Jose M.
, p. 7113 - 7120 (2009)
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.
