FORMATION OF MIXED-METAL BINUCLEAR CARBONYL IONS [MCR(CO)(N)](-PHASE BY THE LASER-ABLATION MOLECULAR-BEAM METHOD() IN THE GAS)

In the laser ablatio-molecular beam (LAMB) method, laser ablation of m etal substrates in vacuum is utilized for the formation of novel organ ometallic and metal complex compounds containing monopositive metal io ns, Mixed-metal binuclear carbonyl ions [MCr(CO)(n)](+), n=0-6, are pr epared in the gas phase by the reaction of laser-ablated metal ions (M +) and Cr(CO)(6) in the molecular beam injected nearby, The relative a bundance of these ions, for M=transition metals, can essentially be ex plained by the M+-Cr bond dissociation energies, Results of density fu nctional calculation show that this is essentially valid. (C) 1997 Joh n Wiley & Sons, Ltd.