铜(Ⅱ)蛋氨酸席夫碱配合物EPR波谱研究

合成了邻香草醛蛋氨酸铜（Ⅱ）和2．4-二羟基苯甲醛蛋氨酸铜（Ⅱ）配合物，测定了它们在室温下多晶粉末EPR谱及室温和低温下不同溶剂中EPR谱，讨论了它们的成键特性，结果表明，这类配合物中，平面内σ配键和平面内π配键均起重要作用．

水杨醛酪氨酸铜配合物合成和EPR波谱

A new Schiff base derived from tyrosine and salicylidene and its copper(Ⅱ ) complex have been synthesized and characterized by elemental analyses,molar conductances,thermal analyses,infrared spectra,electronic spectra and EPR spectra.The composition of the complex is K[CuL(Ac)]· H2O, where L=H13C16NO4. EPR spectra of the copper(Ⅱ ) complex were investigated in various solvents at different temperatures.It is found that the linewidth of four hyperfine lines on solution spectra at room temperature is unequal and changes with mⅠ ,this could be satisfactorily explained by the relaxation effect.The relaxation time and the relaxation rate were calculated.By using spectral parameters from solution spectra at low temperature,the bonding parameters of Cu(Ⅱ ) complex were calculated.The bonding characterization and stability of the complex were disscussed.The results show that the in-planeσ-bond and the in-planeπ-bond in the complex all play an important role.

两个新的Schiff碱双核配合物[Zn_2(L)_2(py)_2](1)和[Cu_2(L)_2(py)_2](2)的合成、晶体结构和光谱性质

利用 Schiff 碱配体 N-(2-羟苄基)水杨醛亚胺(H_2L)合成了两个双核配合物[Zn_2(L)_2(py)_2](1)和[Cu_2(L)_2(py)_2](2).单晶 X-射线衍射结果表明,配合物(1)属单斜晶系,空间群 P2(1)/c,a=1.014 5 nm,b=1.380 6 nm,c=1.267 1 nm,β=102.063°,V=1.735 5 nm^3,Z=2,F(000)=760,μ=1.43 mm^(-1),R_1=0.036 1,wR_2=0.084 0,中心离子采取三角双锥的配位构型;配合物(2)属单斜晶系,空间群 P_2(1)/n,a=0.821 06 nm,b=1.071 5 nm,c=1.786 4 nm,β=99.365°,V=1.550 7 nm^3,Z=2,F(000)=756,μ=1.422 mm^(-1),R_1=0.038 6,wR_2=0.074 6,中心离子采取四方锥的配位构型.

邻香兰素甲硫氨酸席夫碱四核铜配合物的合成及结构表征

An O-Vanillin-methionine Schiff Base complex with copper(Ⅱ) has been synthesized under a mild condition. The complex has been characterized by elemental analysis, UV, FT-IR, TG-DTA and XRD. The crystal structure of the complex belongs to monoclinic, with space group C2/C, a=2.070 4(12) nm, b=1.431 9(8) nm, c=2.812 9(11) nm, β=133.15(2)°, V=6.084(5) nm 3, Z=8, D c= 0.998 Mg/m 3, F(000)=1 836, final R=0.121 8. The results revealed it is a tetranuclear copper(Ⅱ) complex.