Double-stranded helicates of Ni(II), Co(II), Fe(II) and Zn(II) with oligo-α-naphthyridylamino ligand: Synthesis, structure and properties
作者:Rayyat Huseyn Ismayilov、Fuad Famil Valiyev、You Song、Wen-Zhen Wang、Gene-Hsiang Lee、Shie-Ming Peng、Baghir A. Suleimanov
DOI:10.1016/j.poly.2017.12.034
日期:2018.4
the magnetic measurements and X-ray results. Strong π–π interactions were observed for all synthesized double stranded helicates of H3tentra ligand. The measured χMT values at 300 K for complexes 2 and 3 found larger than the expected values for two high-spin Co(II) with S = 3/2 and for Fe(II) ions with S = 2 and g = 2, which attributed to the unquenched orbital coupling.
摘要利用四萘啶三胺配体,N2-(2-(1,8-萘啶-7-基氨基)-1,8-萘啶-7-基)-N7-(1,8-萘啶-2-基)- 1,8-萘啶-2,7-二胺(H3tentra),双链双核螺旋化合物[M2(H3tentra)2(ClO4)4] [M = NiII(1),CoII(2),FeII(3), ZnII(4)]的合成和结构表征。铁(II)配合物的单X射线晶体结构表明,H3tentra的两个配体都围绕金属-金属轴包裹,从而形成了双链双核螺旋化合物,其中Fe-Fe分离为ca。5.326 A.每个配体都使用来自两个不同萘啶环的两个氮原子来配位一个金属中心(Fe或Fe(A)),因此,金属离子的几何结构被描述为扭曲的四面体,两个配体均作为双双态N4捐助者。氮原子与铁原子之间的夹角表示这种变形,其夹角范围为80.45(15)至143.32(14)°。还根据磁性测量和X射线结果,对其他配合物提出了扭曲的