A trend of increasingly more negative zero-field splitting parameters D was observed for a series of pseudo-tetrahedral mononuclear cobalt complexes, Co(L)2I2 (1–3) (L = quinolone, PPh3 or AsPh3) in going down the group from N to P and As (1 = +9.2 cm−1, 2 = −36.9 cm−1 and 3 = −74.7 cm−1) with 2 and 3 exhibiting slow relaxation of the magnetization under an applied DC field.
观察到一系列伪四面体单核
钴配合物Co(L)
2I
2(L = 邻醌,PPh
3或AsPh
3)中的零场分裂参数D越来越负,从N到P和As的组中下降,其中
1 = +9.2 cm
−1,
2 = -36.9 cm
−1和
3 = -74.7 cm
−1,
2和
3在施加直流磁场下表现出磁化弛豫缓慢。