Fig. 1. Temperature dependence of the χT product at 1000 Oe (blue spheres), and comparison with the calculated magnetic susceptibility assuming J = 0.005 cm–1 (solid orange line). The inset displays the molecular structure of the {Yb2} complex along with the orientation of the main magnetic axis in the ground state of the YbIII ions as shown in the purple dashed lines. Colour code: purple (Yb), red (O), blue (N); while all unfilled grey vertices represent carbon atoms.
