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166 Chapter 7
[Ru2(OOCCH3)4(H2O)2]BPh4 (SBU-d)
This precursor was synthesized in accordance to the literature procedure. [199] SBU-a (0.48
g, 1.0 mmol) and AgSO4 (0.17 g, 0.5 mmol) were stirred in 20 ml of water at 40 °C. A white
powder (AgCl) precipitated after 10 min and was filtered off. The resulting brown solution
was cooled down to 0 °C, and then the aqueous solution of NaBPh4 (0.4 g, 1.2 mmol) was
added drop-wise while stirring. The orange-brown product precipitated immediately.
Subsequently, it was filtered and washed with cold water three times (Yield: 0.64 g). The
final product was dried in vacuum at room temperature and stored in a fridge.
Figure 7.9. 1 H-NMR spectrum of SBU-d (solvent: DMSO-d 6 ).
[Ru2(OOCCH3)4] (SBU-e)
The precursor SBU-e was obtained according to the reported method. [206-207] RuCl3·xH2O
(4 g) together with 20mg PtO2 were put into a Fischer-Porter bottle in an argon-filled
glove-box. Then 50 mg degassed methanol was added. After the whole system was
degassed, the reactor was pressurized with ca. 2 atm hydrogen. The solution was stirred
for 3 hours until it was deep blue. Subsequently, the solution was filtered under argon into
50 ml degassed methanol which contain 4.7 g Li acetate. After heating under reflux for 18