bipyramid. Results of direct-current (dc) magnetic measurements and high-frequency electron paramagnetic resonance (HFEPR) indicate the anisotropic S = 3/2 spin ground state of the Co(II) ions with the easy-plane anisotropy for both 1 and 2. Frequency- and temperature-dependent alternating-current (ac) magnetic susceptibility studies reveal slow magnetic relaxation for 1 and 2 under applied fields.
两个七配位Co( II )-
硝酸盐配合物,[Co(tmpdc)(NO 3 ) 2 ] ( 1 ) 和 [Co(tmpdt)(NO 3 ) 2 ]·CH 3 CN ( 2 ) (tmpdc = N , N , N ', N '-四甲基-2,6-
吡啶二甲酰胺, tmpdt = N , N , N ', N已经制备了具有三齿中性
配体 tmpdc 或 tmpdt 的'-四甲基-2,6-
吡啶二
硫代甲酰胺)。当三齿
配体的两个供体原子从1中的氧变为2中的
硫时,它们的晶体结构通过单 X 射线衍射显示出明显不同的配位几何形状。配合物1是封顶八面体,而配合物2是五角双锥体。直流 (dc) 磁测量和高频电子顺磁共振 (H
FEPR) 结果表明Co( II ) 离子具有各向异性S = 3/2 自旋基态,且1和2均具有易平面各向异性。频率和温度相关的交流 (ac) 磁化率研究揭示了1和2在外加磁场下的缓慢磁弛豫。