Syntheses, crystal structures and magnetic properties of two new cyano-bridged bimetallic complexes

Autor: Bo Xu, Minghui Zuo, Yin Qianzhu, Shuanglong Xiang, Shuxin Cui, Xiaoying Zhang, Bai-Li Zhu, Pengzhen He
Rok vydání: 2021
Předmět:
Zdroj: Transition Metal Chemistry. 46:345-351
ISSN: 1572-901X
0340-4285
DOI: 10.1007/s11243-021-00451-x
Popis: 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.
Databáze: OpenAIRE
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