The ferromagnetic NiCl 2 (btd) lacks the initial metamagnetic transition, but does show the high temperature field-polarised transition H c2 = 8 T (Fig. & b, Fig. ). It has a smaller hysteresis and remnant magneti-sation than the nominally antiferromagnetic NiCl 2 (pym), M r = 0.088(2)µ B and H C = 1.0(1) T at T = 1.8 K (Fig. , Fig. ). In no sample is saturation reached strongly suggesting a noncollinear ground state. An approximation for the canting angle, γ, can be determined from M (H) data, assuming a coplanar structure, using