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Syntheses, crystal structures and magnetic properties of two new cyano-bridged bimetallic complexes
Transition Metal Chemistry ( IF 1.6 ) Pub Date : 2021-03-02 , DOI: 10.1007/s11243-021-00451-x
Shuxin Cui , Baili Zhu , Xiaoying Zhang , Shuanglong Xiang , Pengzhen He , Qianzhu Yin , Minghui Zuo , Bo Xu

Two complexes [Fe(1,10-phen)2Ni(CN)4]n (1), {[Fe2(1,10-phen)4(CN)4Co2(1,10-phen)2Fe(CN)6]·2H2O}n (2) were prepared in the reaction of K3[Fe(CN)6] as cyanometalate anions with different metal cations such as Co2+ or Ni2+ under hydrothermal conditions in the presence of 1,10-phenanthroline (1,10-phen). The X-ray crystallographic studies suggested that the two cations Fe2+ and Ni2+ are alternately bridged by the cyanide ligands to form a 1D zigzag chain with 1,10-phen terminal ligands in complex 1. While the cyanide groups bridge Fe2+ and Co2+ ions form step-like chain constituted by pentanuclear structural unit [Fe2(1,10-phen)4(CN)4Co2(1,10-phen)2Fe(CN)6] in complex 2. It had been found that the structures of these complexes are metal ion dependent. The magnetic behavior of complexes 1 and 2 was studied and the nature of the magnetic interactions could not be adequately fit to several different models. Antiferromagnetic interactions appear to dominate in complex 1, and complex 2 is complicated by the orbital contribution to the magnetic susceptibility from the anisotropic Co2+ ion.



中文翻译:

两种新型氰基桥联双金属配合物的合成,晶体结构和磁性

两种络合物[Fe(1,10-phen)2 Ni(CN)4 ] n1),{[Fe 2(1,10-phen)4(CN)4 Co 2(1,10-phen)2 Fe (CN)6 ]·2H 2 O} n2)是在水热条件下,在水热条件下,将K 3 [Fe(CN)6 ]作为氰基金属酸盐阴离子与不同的金属阳离子(例如Co 2+或Ni 2+)反应制备的。 1,10-菲咯啉(1,10-phen)的存在。X射线晶体学研究表明,两个阳离子Fe 2+和Ni2+由氰化物配体交替桥连,形成1D锯齿形链,在复合物1中具有1,10-phen末端配体。氰化物基团桥接Fe 2+和Co 2+离子形成由五核结构单元[Fe 2(1,10-phen)4(CN)4 Co 2(1,10-phen)2 Fe( CN)6 ]在络合物2中。已经发现这些络合物的结构是金属离子依赖性的。配合物12的磁行为进行了研究,但电磁相互作用的性质无法完全适合几种不同的模型。反铁磁相互作用似乎在复合物1中占主导地位,而复合物2由于各向异性Co 2+离子对磁化率的轨道贡献而变得复杂。

更新日期:2021-03-02
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