The dipotassium stannole 1 (0.120 g, 0.180 mmol) and anhydrous DyI3 (0.049 g, 0.090 mmol) were placed together in a J. Young Schlenk flask. THF (ca. 5 mL) was condensed to the flask at -88 °C and the solution was allowed to warm up to room temperature and stirred for 16 h at room temperature. During this time, colorless insoluble materials (KI) formed. After filtration, the solution was concentrated to ca. 2 mL and layered with n-pentane. After two weeks, blockshaped dark red crystals formed. The solution was carefully decanted and the crystals were isolated. Crystalline yield: 0.064 g, 47%. Anal. Calcd for C56H80DyKSi4Sn2