[GRAPHICS]
Cationic complexes of Pt(II) and other late transition metals efficiently c
atalyze Friedel-Crafts acylations of moderately activated arenes by carboxy
lic acid anhydrides, The nature of the catalytically relevant species forme
d from (PhCN)(2)PtCl2 and AgSbF6 and their interactions with the substrates
are studied by NMR and ESI-MS.