Next, 1•(Cl -)3 (Fig. ) was synthesized using a method from the literature but without the addition of sodium sulfide. Specifically, 126 mg (100 μmol) of Au2Cl2(dppe) was added to 20 mL of dichloromethane. To this solution, a sodium borohydride aqueous solution (3.8 mg (100 μmol) per 1 mL) at 0 °C was added. The solution was then stirred at room temperature for 24 h. After evaporating the solvent, the resulting solid was washed with water, a hexane/dichloromethane mixture, and acetone to yield 1•(Cl -)3 (Fig. )). The obtained 1•(Cl -)3 was dissolved in ethanol, and an excess of sodium tetrafluoroborate was added to exchange the counter anion from Cl -to BF4 -, yielding 1•(BF4 -)3 as a powder (Fig. (curve b)).