| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1404752 | Journal of Molecular Structure | 2016 | 7 Pages |
•A new dimeric Cu(II) complex [Cu2L2(N3)4] was synthesized.•The complex was characterized by X-ray, FTIR and UV-Visible techniques.•One-dimensional Cu(II) chain generated by alternating two CuCu distances was shown.•Antiferromagnetic coupling interactions were observed in the complex.
A new asymmetric μ2-1,1-azido double bridged cooper (II), with 2,5-bis(2-pyridyl)-1,3,4-thiadiazole (L), has been synthesized and characterized using single crystal X-ray diffraction, FT-IR, UV-Visible spectroscopic and magnetic measurements. The asymmetric unit of the title compound contains half molecule of formula, C12H8CuN10S, which crystallizes in the triclinic system, space group P 1¯, with a = 6.5916 (4)Å, b = 10.6905 (7) Å, c = 11.5037 (7) Å, α = 106.508 (3)°, β = 105.538 (3)°, γ = 90.233 (4)°, V = 745.99 (8) Å3 and Z = 2. The structure consists of two [CuN5] prismatic polyhedra linked together by edge-sharing to build up a [Cu2N8] dimer arranged in chain. The connectivity along the chain is performed by NN edge sharing between dimers. In the crystal, the molecules are linked together by CH⋯N hydrogen bonds and by π---π interactions between parallel pyridyl rings of neighboring molecules. The interpretation of FT-IR and UV-Vis spectra is consistent with the crystal structure determined by X-ray diffraction. The magnetic properties of the complex confirm the picture of an alternated … Cu-J1-Cu ….J2 … Cu-J1-Cu … magnetic chains. We found in the dimers weak antiferromagnetic exchange interactions J1/k = −5.9 (1) k and between them J2/k = −2.3 k.
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