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氰根桥联配合物[{Cu(tmen)2}2W(CN)8]2[Cu(tmen)(H2O)W(CN)8]2·16H2O的晶体结构和磁性研究
Crystal Structure and Magnetic Properties of Cyanide-bridged Complex [{Cu(tmen)2}2W(CN)8]2[Cu(tmen)(H2O)W(CN)8]2·16H2O
【摘要】 在水溶液中使用[W(CN)8]3-、1,1,2,2-四甲基乙二胺(tmen)与Cu2+离子自组装合成了一个氰根桥联多核配合物[{Cu(tmen)2}2W(CN)8]2[Cu(tmen)(H2O)W(CN)8]2·16H2O(1).X-射线单晶衍射分析表明,配合物1包括氰根桥联的1个中心对称的正方形配位阴离子Cu2W22-和2个V字形配位阳离子Cu2W+,在阴、阳离子中氰根与Cu(Ⅱ)配位的位置分别为赤道平面和姜-泰勒轴方向.磁性研究表明配合物1内通过氰根传递的铁磁相互作用占主导地位,磁耦合常数为J=14.0 cm-1.
【Abstract】 By reacting octacyanotungstate(Ⅴ) with Cu(NO3)2·3 H2 O and 1,1,2,2-tetramethyl-1, 2-ethylenediamine in water, an ionic pair complex [{Cu(tmen)2}2 W(CN)8]2[Cu(tmen)(H2 O)W(CN)8]2·16 H2 O(1) was obtained. Complex 1 is composed of one cyano-bridged square shaped Cu2 W22-anion and two V shaped Cu2 W+cations. In the anion and cations, Cu(Ⅱ) ions connect with W(V) ions by equatorial and axial cyano-bridged linkage, respectively. In the temperature range of 2-300 K, the direct current magnetic susceptibilities of complex 1 indicate the presence of predominant ferromagnetic interactions in the W(V)-C≡N-Cu(Ⅱ) linkage, with the coupling constants J=14.0 cm-1.
【Key words】 octacyanotungstate(Ⅴ); 1,1,2,2-tetramethyl-1,2-ethylenediamine; heterobimetallic complex; crystal structure; magnetic property;
- 【文献出处】 南开大学学报(自然科学版) ,Acta Scientiarum Naturalium Universitatis Nankaiensis , 编辑部邮箱 ,2018年06期
- 【分类号】O641.4
- 【下载频次】134