Crystal structure and magnetic properties of the 1D bimetallic thiocyanate bridged compound: {(CuL₁)[Co(NCS)₄]}(L₁ = N-rac-5,12-Me₂-[14]-4,11-dieneN₄)

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• 作者：Jerzy Mroziń ; ski ; Julia Kł ; ak ; Rafał ; Kruszyń ; ski
• 关键词：Crystal structure ; Heterobimetallic chain ; Thiocyanate bridge ; Magnetism
• 刊名：Polyhedron
• 出版年：2008
• 出版时间：7 April 2008
• 年：2008
• 卷：27
• 期：5
• 页码：1401-1407
• 全文大小：407 K

文摘

The synthesis, crystal structure and magnetic properties are reported for the new bimetallic compound {(CuL₁)[Co(NCS)₄]} where L₁ = N-rac-5,12-dimethyl-1,4,8,11-tetraazacyclotetradeca-4,11-diene. The complex forms a one-dimensional zig-zag coordination polymer along the crystallographic c axis, with Co(II) and Cu(II) ions connected via thiocyanate bridges. The Co(II) centre in the [Co(NCS)₄] fragment approximates a distorted tetrahedral symmetry. The Cu(II) geometry is a distorted tetragonal bipyramid with the apical position occupied by the bridging thiocyanate ligand and the basal ones by the four nitrogen atoms from the macrocyclic ring. The polymer chain nearest Cu(1)22ef.gif"" alt=""cdots, three dots, centered"" title=""cdots, three dots, centered"" border=""0"">Co(1) distances are 6.4152(9) and 6.0988(9) Å and the nearest Cu(1)22ef.gif"" alt=""cdots, three dots, centered"" title=""cdots, three dots, centered"" border=""0"">Co(1) interchain distances are 6.8609(9), 6.9628(9) and 6.0336(10) Å. The magnetization measurements for the examined compound have been carried out over the range 1.8–300 K. This data suggest ferromagnetic interactions through the thiocyanate bridge.