A new Fe(III) complex, [Fe(C26H26O3N4)]NO3.H2O, was obtained by the reaction of Schiff base ligand H4L H4L = 1,1,1,1-tetrakis[(salicylaldimino)methyl]methane} with Fe(NO3)3.9H2O at 1:2 mol ratio and was structurally determined by elemental analyses, IR, EI-MS and single crystal X-ray diffraction analysis. The complex crystallized in the monoclinic system, space group P 21/n with unit cell parameters: a = 12.486(5) Å, b = 15.769(5) Å, c = 12.989(5) Å, b = 95.764(5)°, V = 2544.5(16) Å3, Z = 4, Mr = 578.38, Dc = 1.510 g/cm3, μ = 0.650 mm-1, F(000) = 1204, R = 0.0400, wR = 0.1109 for 3701 reflections with I >2s (I). It is of interest to note that one of the pendant arms of H4L ligand was hydrolyzed when H4L coordinated with Fe(III) ions, simultaneously, the resulting amino group was protonated to maintain the charge balance of the system.
通过希夫碱
配体 H4L H4L = 1,1,1,1-tetrakis[(salicylaldimino)methyl]methane} 与 Fe(
NO3)3.9 以 1:2 的摩尔比进行反应,得到了一种新的
铁(III)配合物 [Fe(C26H26O3N4)] .
H2O,并通过元素分析、红外光谱、电离质谱和单晶 X 射线衍射分析确定了其结构。该复合物在单斜体系中结晶,空间群为 P 21/n,单胞参数为:a = 12.486(5) Å,b = 15.769(5) Å,c = 12.989(5) Å,b = 95.764(5)°, V = 2544.5(16) Å3, Z = 4, Mr = 578.38, Dc = 1.510 g/cm3, μ = 0.650 mm-1, F(000) = 1204, R = 0.0400, wR = 0.1109 for 3701 reflections with I >2s (I).值得注意的是,当 H4L 与
铁(III)离子配位时,H4L
配体的一个垂臂被
水解,同时产生的
氨基被质子化,以保持体系的电荷平衡。