Catalysts for selective aerobic oxidation under ambient conditions - Advances in Catalytic Activation of Dioxygen by Metal Complexes - page 236

with saturation observed at high CEES , suggesting a replacement of a
and/or ligand by CEES to form an inactive Au(III)-complex.

The presence of both and appear to be critical for catalytic
activity. Since the activity of the catalysts depends on the ratio of Au : :
this ratio was kept constant at 1 : 2 : 1 in the determination of the
dependence. The rate increases quadratically with with
the reaction rate order 1 < n < 2. The dependence (see Figure 7 in our
recent publication 22 ) is inversely hyperbolic, which is consistent with
once again competing with and/or CEES for open coordination
sites on the catalytically active Au center. This, in turn, decreases the
concentration of the catalytically active Au complexes. The rate of the main
reaction is independent of concentration (Table 1), implying that Au(III)
reduction and not Au(I) reoxidation is rate limiting.