Ab initio molecular orbital techniques are used to probe the structure
and stability of Ag(C6H6)(+) and Ag(C6H6)(2)(+) recently observed in
electrospray ionization mass spectra. Of all the Ag(C6H6)(+) structure
s investigated, the C-6v complex is the most stable. Our calculated fi
rst binding energy of benzene to Ag+ is in agreement with the experime
ntal value and the second binding energy of benzene to Ag+ is estimate
d to be 114 (10) kJ mol(-1). (C) 1997 Elsevier Science B.V.