Temperature-dependent effective magnetic moment (per Fe center) of compound8in toluene solution betweenT= 4 and 350 K with an applied magnetic field of 0H= 1 kG. Symbols: experimental data, recorded with a field warming (FW) sequence after zero-field cooling (gray) or with a field cooling (FC) sequence and a sweep rate of <-0.3 K min–1(dark yellow). The red line shows the temperature-dependent effective magnetic moment (per Fe center) that was determined with a Bleaney–Bowers approach, assuming an antiferromagnetic coupling (J= -43 K) of the twoS= 2 spin centers in the dimer8and an additional unidentified paramagnetic byproduct. The green line is guide to the eye (see text).
