Magnetic property measurements were carried out on a Quantum Design MPMS superconducting quantum interference device (SQUID). A polycrystalline sample of CrCl 2 (pym) (26.6 mg) was immobilised in eicosane (44.5 mg) and sealed in a low-paramagnetic-impurity borosilicate glass ampoule under vacuum. Magnetic susceptibility measurements were performed under field cooled (FC) and zero-field cooled (ZFC) conditions in a 0.01 T dc field from 2 K to 300 K. Isothermal magnetisation measurements were performed at 2 K from 0 T to 5 T to -5 T to 0 T. Data were corrected for the diamagnetism of the sample using