Synthesis, Characterization, and Catalytic Activity of Cationic NHC Gold(III) Pyridine Complexes

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A series of cationic gold(I/III) pyridine complexes of the type [(L)Au(pyr)](PF 6 ) and [(L)AuCl 2 (pyr)](PF 6 ), where L = IPr, ( 1, 5 ); L = IMes ( 2, 6 ); L = I t Bu, ( 3, 7 ); L = ICy ( 4, 8 ); and L = PPh 3, ( 9, 10 ), were synthesized and characterized by NMR spectroscopy and single-crystal X-ray diffraction. The stability of the new complexes and their catalytic activity in five well-established organic transformations were assessed.