(O2NCl2) with a distorted trigonal bipyramidal geometry. Two Fe(III) ions are bridged by the oxygen atoms from two hmp ligands, with Fe ⋅ ⋅ ⋅ Fe distance of 3.158(1) A and Fe-O-Fe bridge angle 107.37(7)°. Magnetic studies in the temperature range 300–4.2 K indicated a moderately strong intramolecular antiferromagnetic coupling between the high-spin Fe(III) ions with J = − 38.5 cm− 1.
摘要 通过 [Mn4(hmp)6(
NO3) 反应合成了双 (μ-alkoxo)-桥连双核
铁 (III) 配合物 [Fe2(hmp)2Cl4] (I), [hmp = 2-羟
甲基吡啶] 2(
H2O)2](
ClO4)2 与 (Et4N)[FeCl4] 在起始试剂缓慢扩散到溶剂中的条件下,并通过单晶 X 射线衍射和变温磁化率测量表征。
铁中心具有混合
配体五重配位 (O2NCl2) 和扭曲的三角双锥几何形状。两个 Fe(III) 离子被来自两个 hmp
配体的氧原子桥接,Fe ⋅ ⋅ ⋅ Fe 距离为 3.158(1) A,Fe-O-Fe 桥角为 107.37(7)°。在 300-4.2 K 温度范围内的磁性研究表明,高自旋 Fe(III) 离子之间存在中等强度的分子内反
铁磁耦合,J = − 38.5 cm− 1。