Mercury(II) acetate/thiocyanate coordination polymers with n-donor ligands, spectroscopic, thermal and structural studies |
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| Authors: | Ghodrat Mahmoudi Matthias Zeller |
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| Institution: | a Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P.O. Box 14155-4838, Tehran, Islamic Republic of Iran
b Department of Chemistry, Youngstown State University, One University Plaza, P.O. Box 44555-3663, Youngstown, OH, USA |
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| Abstract: | Three new mercury(II) coordination polymers, Hg2(μ-bpa)(μ-SCN)2(μ-CH3COO)2]n (1), Hg2(μ-4-bpdb)1.5(μ-CH3COO)(μ1,1- SCN)(μ1,3-SCN)(SCN)]n · CH3CN (2) and Hg(μ-3-bpdb)(CH3COO)2]n (3) {(bpa = 1,2-bis(4-pyridyl)ethane, 4-bpdb) = 1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene and 3-bpdb = 1,4-bis(3-pyridyl)-2,3-diaza-1,3-butadiene, have been synthesized and characterized by CHN elemental analysis and IR spectroscopy. The single crystal X-ray data show the compound 1 is two-dimensional coordination polymer as a result of simultaneously bridging 1,2-bis(4-pyridyl)ethane, acetate and thiocyanate ligands. The single-crystal X-ray data of the compound 2 show that the complex to be a two-dimensional polymer, one of Hg atoms has four-coordinate and one of them has seven-coordinate. Three SCN− anions show three different coordination modes with terminal, μ1,1-bridge and μ1,3-bridge fashions. The structural studies of compound 3 show the structure may be considered a one-dimensional coordination polymer of mercury(II) consisting of linear chains formed by a bridging 3-bpdb ligand. The thermal stabilities of these compounds were studied by thermal gravimetric (TG) and differential thermal analyses (DTA). |
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| Keywords: | Mercury(II) Coordination polymer 1 2-Bis(4-pyridyl)ethane 1 4-Bis(4-pyridyl)-2 3-diaza-1 3- butadiene 1 4-Bis(3-pyridyl)-2 3-diaza-1 3-butadiene |
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