G. Ardizzoia, Daniel Ghiotti, B. Therrien
Feb 24, 2018
Citations
0
Influential Citations
13
Citations
Journal
Inorganica Chimica Acta
Abstract
Abstract Two imidazo[1,5- a ]pyridine-based ligands, namely 2-(1-phenylimidazo[1,5- a ]pyridin-3-yl)phenol (N,OH-L Ph ) and 2-(1-methylimidazo[1,5- a ]pyridin-3-yl)phenol (N,OH-L Me ) have been reacted with different divalent metals (M = Co, Cu, Ni, Pd) to obtain the following complexes [Co(N,O-L Ph ) 2 ] ( 1 ), [Cu(N,O-L Ph ) 2 ] ( 2 ), [Ni(N,O-L Ph ) 2 ] ( 3 ), [Pd(N,O-L Ph ) 2 ] ( 4 ), [Co(N,O-L Me ) 2 ] ( 5 ), [Cu(N,O-L Me ) 2 ] ( 6 ), [Ni(N,O-L Me ) 2 ] ( 7 ) and [Pd(N,O-L Me ) 2 ] ( 8 ). These homoleptic complexes showed the monoanionic ligands to be coordinated in a N,O -bidentate mode via the pyridine-like nitrogen of the imidazo[1,5- a ]pyridine skeleton and the phenolic oxygen. The coordination mode of the ligands was confirmed by the single-crystal X-ray structure analysis of [Co(N,O-L Ph ) 2 ] ( 1 ) and [Pd(N,O-L Me ) 2 ] ( 8 ). The palladium compounds [Pd(N,O-L Ph ) 2 ] ( 4 ) and [Pd(N,O-L Me ) 2 ] ( 8 ) proved to be good catalysts in the Heck reaction between iodobenzene and different olefins.