Fig. 2. Total rates (kNMR = k1 + k2) for methanol addition to 1-phenylpropyne catalysed by different (IPr)AuX salts (X− is indicated on the x-axis). The experiments were performed in a mixture of methanol and dichloromethane: 1 : 2.4 (red, black) and 1 : 0.08 (blue, green), respectively. The hollow points refer to the experiment with addition of 1 equivalent of Bn-BU (black) or iPr-BU*H2SO4 (green) with respect to the concentration of the gold catalyst.
