含μ-酚氧桥双核铜(Ⅱ)配合物的结构

The Structure of Novel Binuclear μ-Phenolato-Bridged Copper(Ⅱ) Complexes

本文采用EXAFS和远红外光谱研究了两种新型含μ—酚氧桥双核铜(Ⅱ)配合物的结构:[Fsal(GG)_2ICu_2Cl_3]·H_2O(1)和[Fsal(GG)_2Cu_2(OH)](ClO_4)_2·H_2O(2)。此处Fsal(GG)_2代表2,6-双[(甘氨酰甘氨酸)亚氨亚甲基]-4-甲酚。根据EXAFS的测定结果,求得氯桥配合物中Cu(Ⅱ)的配位数为6,Cu-O、Cu-N、Cu-Cl和Cu-Cu的原子间距分别为1.91、2.00、2.55和3.26A,而羟桥的配位数为5,其Cu-O、Cu-N和Cu-Cu原子间距分别为1.87、1.95、2.91A.

By means of EXAFS and FIR, the structure of two novel binuclear μ-phenolato -bridged copper(II) complexes, [Fsal(GG)_2Cu_2Cl_3]·H_2O and [Fsal(GG)_2Cu_2(OH)] (ClO_4)_2·H_2O, was characterized, where Fsal(GG)_2 stands for 2, 6-bis [(glycylglycine) iminomethylene] -4-methyl-Phenol. The EXAFS data have been fitted to a dimeric structural model with noise correction, and from the fit, the coordination numbers of copper(II) and atomic distances of Cu-O, Cu-N, Cu-Cl and Cu-Cu have been obtained. FIR spectra suggest a trigonal bipyramidal environment of copper(II) in the chloro-bridged complex and a compressed tetrahedral environment for the hydroxo-bridged one.