Approximately 10 mL of the H 3 [Bi(SCN) 6 ] solution synthesised as described above was added to Fe 2 O 3 (1 mmol, 159.7 mg), and then stirred for 1 hr. Excess Fe 2 O 3 was then filtered off under vacuum, and the deep red solution was left to slowly evaporate over a few days, yielding diffraction quality very dark green single crystals of Fe[Bi(SCN) 6 ].