Synthesis and ferromagnetic interaction in oxamido- bridged heterodinuclear copper (Ⅱ)- chromium (Ⅲ) complexes

作     者：李延团 焉翠蔚 廖代正 

作者机构：Department of Chemistry Qufu Normal University Qufu Shandong 273165 ChinaDepartment of Biology Qufu Normal University Qufu Shandong 273165 ChinaDepartment of Chemistry Nankai University Tianjin 300071 China 

出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)

年 卷 期：1999年第17卷第1期

页      面：24-31,1页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：Project supported by the Natural Science Foundation of Shandong Province of China (No. Y97-D17076, Q96B01115) the National Natural Science Foundation of China (No. 29631040) 

主　　题：Qxamido-bridge ferromagnetic interaction Cu(II)-Cr(III) binuclear complex 

摘      要：Four μ-oxamido heterodinuclear complexes, [Cu(oxae)Cr(L)2] (NO3)3,where oxae denotes the N, N’-bis (2-aminoethyl) oxamido dianion and L represents 1, 10-phenanthroline ( phen); 5-nitro-1, 10-phenanthroline (NO2-phen); 5-methyl-1, 10-phenanthroline (Me-phen) and 2,2’-bipyridine (bpy), have been synthesized and characterized by elemental analyses, magnetic moments (at room temperature) and molar conductivity measurements and spectroscopy. It is proposed that these complexes have extended oxamido-bridged structures consisting of a copper (Ⅱ) ion and a chromium (Ⅲ) ion, which have a square planar environment and octahedral environment, respectively. The cryomagnetic properties of the [Cu(oxae)Cr(bpy)2] (NO3)3(1) and [Cu(oxae)Cr(phen)2] (NO3)3(2) complexes have been measured over the range of 4.2-300 K. The least-squares fit of the experimental data based on the spin Hamiltonian, H = - 2JS1·S2, the exchange integrals (J) were evaluated as + 36.9 cm-1 for 1 and +35.8 cm-1 for 2. The results have confirmed