“…To our delight, cyclohexanol 2 could be successfully obtained in H 2 O, a solvent widely acknowledged for its abundance, non-toxicity, and environmental compatibility. 59,60 This outcome confirmed our hypothesis that the NHC Rh complex exhibited hydrogenation activity in this vital transformation, even in water. When the reaction was carried out with 0.5 mol% bis-NHC-Rh complex 4, 1 mmol 1, and 5 mol% t-BuONa in H 2 O at 30 °C, 5 bar H 2 for 24 h yielded the highest output of 20%.…”