Synthesis of LCrK•H2O: Inside a nitrogen-filled glovebox KOAc (55 mg, 1 equiv.) was added to solution of the dialehyde precursor A (200 mg, 1 equiv., see ESI for preparation) in acetonitrile (10 mL) and the solution was stirred at room temperature for 30 min. Afterwards 1,2diaminocyclohexane (64 mg, 1 equiv.) and Cr(OAc)2 (95 mg, 1 equiv.) were added and the reaction mixture was stirred for a further 16 h at room temperature. The complex was oxidized by exposure to air and by the addition of acetic acid (60 µL, 2 equiv.) and the solution was stirred for 24 h open to air at room temperature. Afterwards the suspension was filtered, and all volatiles were in vacuum. The resulting solid was washed with Et2O (2 x 50 mL) and dried in vacuo to afford LCrK•H2O as a brown powder (319 mg, 82%