2,6-吡啶二甲酸合钴配合物的合成和结构

Synthesis and Crystal Structure of Pyridine-2, 6-dicarboxylate Cobalt Complexes

本文报道了2,6-吡啶二甲酸(dipcH_2)合钴配合物:[dipo Co(μ-4,4′-bpy)Co dipc]·8H_2O(1),[dipc Co(ImH)_2]_n(2)的合成和它们的晶体结构。配合物1:单斜晶系。空间群为P2_1/c。a=1.0614(5),b=2.0144(8),c=0.7342(2)nm;β=106.33(3)°;Z=2。最后的偏正因子R_1=0.043。由4,4′-bpy桥联形成双核Co配合物。4,4′-bpy中两个吡啶环共平面。配合物2:正交晶系。空间群为P2_12_12_1,a=0.9011(5)nm,b=1.0078(1)nm,c=1.6625(2)nm;Z=4。最后的偏正因子R_1=0.033。dipc中羧氧原子参与了和另一Co(Ⅱ)配位,形成链状结构。两个ImH处于反位,二面角为44.4°。

Synthesis and crystal structure of pyridine-2, 6-dicarboxylate complexes, [(dipc) Co(μ-4, 4'-bpy)Co(dipc)]·8H_2O(1), [(dipc)Co(ImH)_2]_n(2), were reported in this paper. Complex 1: monodinic, space group P2_1/c with a=1.0614(5), b=2.0144(8), c=0.7342(2)nm, β=106.33(3)°, Z=2, final R_1=0.043. The binuclear cobalt complex is formed with 4, 4'-bpy as a bridging ligand. The two pyridine ring of the 4, 4'-bpy are coplane in the complex. Complex 2: orthorhombic, space group P 2_12_12_1 with a=0.9011(5), b=1.0078(1), c=1.6625(2)nm, Z=4, final R_1=0.033. One of O—C—O of dipc is coordinated to another Co(Ⅱ), forming a chain structure. Two Im H ligands are located at axial positions with dihedralangle 44.4°.