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KMID : 0385520050180050381
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Analytical Science & Technology
2005 Volume.18 No. 5 p.381 ~ p.385
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Synthesis, crystal structure, and thermal property of piperazine - templated copper(Ⅱ) sulfate, {H₂NCH₂CH₂NH₂CH₂CH₂}{Cu(H₂O)6}(SO₄)₂
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Kim CH
Park CJ/Lee SG
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Abstract
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The title compound, {H₂NCH₂CH₂NH₂CH₂CH₂}{Cu(H₂O)_6}(SO₄)₂, Ⅰ, has been synthesized under solvo/hydrothermal conditions and their crystal structure analyzed by X-ray single crystallography. Compound Ⅰ crystallizes in the monoclinic system, P2₁/n space group with α = 6.852(1), b = 10.160(2), c = 11.893(1) Å, β = 92.928(8)°, V = 826.9(2)ų, Z = 2, Dx = 1.815 g/㎤, R₁ = 0.031 and ωR₂ = 0.084. The crystal structure of the piperazine templated Cu(Ⅱ)-sulfate demonstrate zero-dimensional compound constituted by doubly protonated piperazine cations, hexahydrated copper cations and sulfate anions. The central Cu atom has a elongated octahedral coordination geometry. The crystal structure is stabilized by three-dimensional networks of the intermolecular Owater-H…Osulfate and Npip-H…Osulfate hydrogen bonds between the water molecules and sulfate anions and protonated piperazine cations. Based on the results of thermal analysis, the thermal decomposition reaction of compound Ⅰ was analyzed to have three distinctive stages.
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