Gas-phase reactions of nickel and nickel oxide clusters with nitrogen oxides. 3. Reactions of cations with nitric oxide

A fast flow reactor-quadrupole mass spectrometer system coupled with a lase r vaporization source is used to study the gas-phase reactions of nickel an d nickel oxide cluster cations with nitric oxide. Pseudo-first-order bimole cular rate constants are reported for the reactions of NO with nickel and n ickel oxide duster cations and O-2 reactions with nickel cluster cations. T he product distributions indicate chat several different reaction mechanism s occur between NO and Ni-x(+) and NixOy+. Competing processes such as oxid ation, NO addition, and replacement of oxygen with nitric oxide are observe d to occur. Also, the presence of magic peaks in the distributions indicate s unusually stable product cluster species.