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. Author manuscript; available in PMC: 2008 Oct 6.
Published in final edited form as: J Am Chem Soc. 2006 Oct 18;128(41):13497–13507. doi: 10.1021/ja063567+

Figure 8.

Figure 8

SQUID magnetometry for 5 mM 1 in THF with numerical fits to the tetraradical model (Figure 10, eq. 1 and 2). For the χT vs. T fits (top) and the M/Msat vs. H/T fits (bottom), the J2/k (diagonal coupling) is set to −1.1 K and −0.5 K, respectively. The variable parameters (parameter dependence and R2) are as follows: at 30000 Oe in the warming mode, J1/k = −1.4 K, w = 1.11 (0.32, 0.998); at 5000 Oe in the warming mode, J1/k = −1.2 K, w = 1.10 (0.30, 0.995); at 1.8 K, J1/k = −0.6 K, Msat = 0.76 μB (0.85, 0.999); at 3 K, J1/k = −0.7 K, Msat = 0.86 μB (0.97, 1.000).