Figure 6: EPR and magnetic data for 3Na–5Na.
From: Molecular and electronic structure of terminal and alkali metal-capped uranium(V) nitride complexes
(a) X-band EPR spectrum at 5 K, (b) NIR/Vis/UV in toluene at room temperature, (c) χMT in 0.1 T field, (d) and magnetization at 1.8 K for 4Na: experimental (black curves and points) and fitted (dashed curves). (e) Q-band EPR spectra of 5Na and 3Na at 5 and 7 K, respectively: fits use Equation 1 for 5Na (red) and Equation 2 for 3Na with jzz=+0.7678, cm−1 (red) and jzz=–0.7678, cm−1 (blue). (f) Magnetization (per dimer) for 3Na at 1.8 K: the slow magnetization dynamics as evidenced by the magnetic hysteresis has not been simulated; the equilibrium magnetization is shown and differs depending on the sign of the exchange interaction.
