). The methanol-solvated MnCl-MFU-4l from the above procedure was subsequently used without isolation of MnCl-MFU-4l. Solvent exchange for the methanol-solvated MnCl-MFU-4l was performed with ~10 mL of acetonitrile at room temperature three times over 1 day. After the bulk of acetonitrile was decanted, the acetonitrile-solvated MnCl-MFU-4l was suspended in a solution of copper(I) chloride dimethylsulfide (0.15 g, 0.92 mmol, 20 equiv.) in ~15 mL of acetonitrile at 60 °C for 1 day. The supernatant was decanted, and the residual solid was suspended in a second fresh solution of copper(I) chloride dimethylsulfide (0.15 g, 0.92 mmol, 20 equiv.) in ~15 mL of acetonitrile at 60 °C for another day. The beige solids were suspended with ~15 mL of acetonitrile at room temperature twice, with ~15 mL of acetonitrile at 60 °C once, and with ~10 mL of methanol at room temperature three times. The beige powder was collected by filtration and then activated under dynamic vacuum at 90 °C for 12 h, then heated at 200 °C for 48 h to afford 0.044 g (85% based on the starting Mn(OAc)-MFU-4l material) of product as a microcrystalline beige solid.