铜(Ⅱ)与反式丁烯二酸根和2,2′-联吡啶配合物的研究

Studies on Copper(Ⅱ) Fumarate Complex with 2,2'-Bipyridine

合成了铜(Ⅱ)与反式丁烯二酸根和2,2＇-联吡啶形成的配合物,并进行了元素分析、红外光谱、电子反射光谱和变温磁化率等研究,确定其组成为[Cu_2(fum)(bipy)_4][fum]·12H_2O,其中bipy=2,2＇-联吡啶,fum=反式丁烯二酸根.测定了配合物的晶体结构,[Cu_2(fum)(bipy)_4][fum]·12H_2O晶体属三斜晶系,P1(＃2)群;晶胞参数:α=1.0697(2)nm,b=1.2820(2)nm,c=1.0470(3)nm,α=101.88(2)°,β=101.93(2)°,γ=79.41(1)°;Z=1,最终偏离因子R=0.033.分子为反式丁烯二酸根桥联两个Cu(Ⅱ)单元的双核结构,每个Cu(Ⅱ)具有畸变的三角双锥配位环境.变温磁化率研究表明,配合物中存在弱的铁磁性偶合作用.

Copper(Ⅱ) fumarate complex with 2,2' - bipyridine, [Cu2(fum) (bipy)4] [fum]·12H2O, has been synthesized and characterized by elemental analyses, IR, electronic reflectance spectra and magnetic studies. The single crystal X-ray diffraction study shows that the complex is triclinic, with space group P1 (#2),a = 1.0697(2)nm, b = 1.2820(2)nm, c = 1.0470(3)nm, α= 101.88(2)°, β= 101.93(2)°, γ = 79.41(1)°, Z = 1, and R - 0.033. Two copper(Ⅱ) atoms are bridged by a fumarate group, with each copper(Ⅱ) atom coordinated with two 2,2'- bipyridine molecules, forming a distorted trigonal bipyramidal configuration. The alternating temperature magnetic susceptibility study suggest that there exist weak ferromagnetic interaction between two copper(Ⅱ) atoms.