Fig. 8. Recycling of the catalyst system 2 (12.5 μmol complex 2, 2/HNTf₂ = 1 : 1) using 2-MTHF (2.0 mL) as the solvent and water (2.0 mL) as the extracting agent in an aqueous biphasic system. Each cycle was run for 16 h (20 bar CO₂ + 60 bar H₂ at r.t.; 140 °C reaction temperature). The TONs obtained per cycle are shown in dark grey, the total TONs summing up the cycles are shown in light grey.