Syntheses, structures, and magnetic properties of cubane-based cobalt and nickel complexes with ONO -tridentate ligands
作者:Megumi Yoshitake、Momoko Nishihashi、Yasumasa Ogata、Ko Yoneda、Yasunori Yamada、Hiroshi Sakiyama、Akio Mishima、Masaaki Ohba、Masayuki Koikawa
DOI:10.1016/j.poly.2017.03.043
日期:2017.11
cubane-based complexes, [Co4(L1-H)4Cl2(MeOH)2] (1) [H2L1-H = N-(2-hydroxymethylphenyl)salicylideneimine], [Ni4(L1-Bz)4(EtOH)4] (2) [H2L1-Bz = N-(2-hydroxymethylphenyl)-5,6-benzosalicylideneimine], and [Co2Ni(L1-H)2(HL1-H)(CH3COO)2] (3), have been characterized by X-ray crystal structure analyses and magnetic measurements. Homo-metal complexes 1 and 2 are tetranuclear complexes. Complex 1 has a defective
摘要三种基于古巴的配合物[Co4(L1-H)4Cl2(MeOH)2](1)[H2L1-H = N-(2-羟甲基苯基)水杨亚胺],[Ni4(L1-Bz)4(EtOH) )4](2)[H2L1-Bz = N-(2-羟甲基苯基)-5,6-苯并水杨亚胺]和[Co2Ni(L1-H)2(HL1-H)(CH3COO)2](3)具有通过X射线晶体结构分析和磁测量来表征。均金属配合物1和2是四核配合物。配合物1的双库仑金属芯有缺陷。钴离子的化合价态被指定为混合化合价Co(II)2Co(III)2。相反,2采用一个简单的古巴核心,该核心由四个[Ni(II)(L1-Bz)]单体单元组成。配合物3具有新颖的杂金属和混合价三核金属核结构。1-3的低温磁研究表明,由于以古巴为基础的金属芯结构,铁磁相互作用占主导地位。