Abstract
The metallated Fischer-type carbene complexes (CO)(5)M=C(NMe(2))C[triple bond]CLi (M = Cr, W) react with Ph(3)PAuNO(3) to form the beta-substituted products (CO)(5)M=C(NMe(2))C[triple bond]CAuPPh(3). In solution these products isomerise by formal metal fragment exchange to furnish Ph(3)PAuC(=NMe(2))C[triple bond]CM(CO)(5). A preliminary kinetic investigation by means of (1)H-NMR spectroscopy indicates an unusual and complicated reaction mechanism. Model DFT calculations predict small energy differences between the products before and after the metal fragment exchange.
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