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合成和表征了4个不同外源桥的醇式双核铜配合物:[Cu_2(L)(u-Cl)](1),[Cu_2(L)(p-N_3)]·DMF(2),[Cu_2(L)(g-OCH_3)(3)和[Cu_2(L))(u-C_3H_3N_2)·1/2C_2H_5OH(4).其中L是负三价的双核配体2,6-二甲酰-4-甲基苯酚双缩苯甲酰肼。配合物(3)的晶体为P1空间群,a=0.8294(1),b=0.9333(3),c=1.4736(6)nm,谨=79.51(3),"=80.93(2),)F=81.32(2)°,Z=1.磁性研究表明外源桥对金属离子之间磁交换作用的影响与其在光化学序列中的顺序基本一致。通过分子力学和量子化学计算,从结构因素和电子效应两方面解释了上述配合物的酮式和醇式互变异构体对磁交换作用的影响。
The synthesis and characterization of alcoholic binuclear copper complexes of four different exogenous bridges: [Cu 2 (L) (u-Cl)] (1), [Cu 2 (L) [Cu_2 (L) (g-OCH_3) (3) and [Cu_2 (L)) (u_C_3H_3N_2) · 1 / 2C_2H_5OH (4), where L is the negatively charged binuclear ligand 2,6- -4-methylphenol bisbenzhydrazide. The crystal of complex (3) is P1 space group, a = 0.8294 (1), b = 0.9333 (3) and c = 1.4736 (6) nm. F = 81.32 (2) °, Z = 1. Magnetic studies show that the effect of exogenous bridges on the magnetic exchange between metal ions is basically the same as their sequence in photochemical sequence. By means of molecular mechanics and quantum chemistry calculations, The electronic effects explain both the effects of the keto and alcohol tautomers of the above complexes on the magnetic exchange effect.