两个双核铁（Ⅲ）和三足配体的配合物的合成和晶体结构

运用三足四齿配体三（2－甲基吡啶）胺（TPA）或三（2－甲基苯丙咪唑）胺（TBA）,得到两个双核铁(III)配合物，[Fe₂L₂(μ₂-O)(μ₂-p-NH₂-C₆H₄COO)]³⁺(L = TPA, 1 和 L = TBA,2)。两个配合物均为单斜晶系，空间群为P2(1)/c.晶胞参数 1: a =1.4529(4), b = 1.6622(5), c = 2.0625(6) nm, β= 100.327(5)º,V = 4.900(3) nm³, z = 4, F(000) = 2344, 分子量M_r = 1142.91, Dc= 1.549 g/cm³, R₁ = 0.0544,R₂ = 0.0962. 2: a = 1.3378(4), b = 2.1174(7), c =2.4351(7) nm, β= 97.315(6)º, V = 6.842(4) nm³,z = 4, F (000) = 3116, 分子量M_r = 1505.08, Dc= 1.444 g/cm³, R₁ = 0.0793, R₂ = 0.1623. 在两个双核铁(III)配合物中，中心的三价铁和配体TPA或TBA上的四个氮原子和两个氧原子通过不同的桥形成一个畸变的八面体构型。

Synthesis and Crystal Structures of Two Dinuclear Iron(III) Complexes with Tripodal Ligands

By using the tripodal tetradentate ligands of tris(2‐pyridylmethyl)amine (TPA) or tris(2‐benzimidazolylmethyl)amine (NTB), two dinunclear iron(III) complexes [Fe₂L₂(μ₂‐O)(μ₂‐p‐NH₂‐C₆H₄COO)]³⁺ (L=TPA, 1 and L=NTB, 2 ) were obtained. Both of the two complexes crystallize in monoclinic system with space group P2(1)/c. The cell parameters of 1 : a=1.4529(4) nm, b=1.6622(5) nm, c=2.0625(6) nm, β=100.327(5)°, V=4.900(3) nm³, Z=4, F(000)=2344, M_r=1142.91, D_c=1.549 g/cm³, R₁=0.0544, R₂=0.0962. The cell parameters of 2 : a=1.3378(4) nm, b=2.1174(7) nm, c=2.4351(7) nm, β=97.315(6)°, V=6.842(4) nm³, Z=4, F(000)=3116, M_r=1505.08, D_c=1.444 g/cm³, R₁=0.0793, R₂=0.1623. In both cases, the central iron(III) metal ions are coordinated to the four nitrogen atoms of TPA (or NTB) and two oxygen atoms from two different bridges to form a distorted octahedral geometry.