Magnetic measurements of 1 reveal relatively strong antiferromagnetic interactions between the Fe centres. The experimental dc susceptibility data (T = 2-400 K, B = 0.1 T) for 1 is plotted in Figure as the χT product versus T, where χ is the molar magnetic susceptibility, T is the temperature, and B the applied magnetic field. The value of χT at T = 300 K is ~45 cm 3 K mol -1 , significantly lower than that expected for the sum of the Curie constants for thirty Fe III (S = 5/2) ions with gFe = 2.00 (131.25 cm 3 K mol -1 ). As the temperature decreases, the magnitude of χT decreases rapidly, reaching a value of ~3.5 cm 3 K mol -1 at T = 2 K, suggestive of a small/diamagnetic spin ground state. At T > 300 K, the χT value increases slowly, with no sign of an inflection or jump in value. Magnetisation data (T = 2-7 K, B = 0.5 -7 T) appear somewhat S-shaped, with the low field data appearing to saturate at ~2 T before increasing rapidly up to ~5T, and then increasing more gradually up to 7 T. This is indicative of the presence of multiple low lying spin states, stabilised through increasing field strength.