| Abstract
| - Two novel inorganic−organic hybrid 3D extended networks of Ni(II) and Mn(II) having molecular formulas [(maleate)2Ni3(bpe)4(H2O)4](NO3)2·H2O (1) and [(adipate)Mn(bpe)] (2), respectively, have been synthesized and characterized by X-ray single-crystal analysis and low-temperature magnetic study.
- Two novel inorganic−organic hybrid 3D extended networks of Ni(II) and Mn(II) having molecular formulas[(maleate)2Ni3(bpe)4(H2O)4](NO3)2·H2O (1) and [(adipate)Mn(bpe)] (2) (bpe = 1, 2-bis(4-pyridyl)ethane), respectively,have been synthesized and characterized by single-crystal X-ray diffraction studies and low-temperature (300−2 K)magnetic measurements. Compound 1 crystallizes in the monoclinic system, space group C2/c (No. 15), withchemical formula C56H62N10Ni3O19, a = 30.955(4) Å, b = 12.705(3) Å, c = 17.058(5) Å, β = 117.26(2)°, and Z= 4. Compound 2 crystallizes in the triclinic system, space group P1̄ (No. 2), with chemical formula C18H20MnN2O4, a = 8.492(2) Å, b = 9.444(2) Å, c = 11.533(3) Å, α = 97.19(1)°, β = 94.64(1)°, γ = 105.02(1)°, andZ = 2. The structure determination reveals for both a 3D network. Compound 1 contains two crystallographicallyindependent Ni(II) ions in different octahedral environments. Ni(1) lies on an inversion center, and its coordinationenvironment comprises two chelating maleate anions and two bpe nitrogen donors, while the Ni(2) ion is surroundedby meridionally disposed three bpe N atoms, two water molecules, and one oxygen donor from the dicarboxylateanion. Of the three crystallographic independent bpe ligand, one presents an anti and the others a gaucheconformation. The corresponding N-to-N distances are 9.344, 6.543, and 6.187 Å. Variable-temperature magneticsusceptibility measurement of the complex reveals the existence of a dominant ferromagnetic interaction within themolecule. Compound 2 is composed of Mn2 dimer units linked by adipate anions to form corrugated 2D sheetswhich, on interconnection through bpe (anti conformation, N-to-N distance of 9.391 Å), produces an interpenetrated3D α-polonium-related type net. Complex 2 reveals to be antiferromagnetic fitting data using a dimeric Mn(II)model that considers negligible magnetic transmission through the carbon skeleton of adipate and the bpe pathway.
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