Abstract
Three new mercury(II) coordination polymers, [Hg 2(μ-bpa)(μ-SCN) 2(μ-CH 3COO) 2] n ( 1), [Hg 2(μ-4-bpdb) 1.5(μ-CH 3COO)(μ 1,1- SCN)(μ 1,3-SCN)(SCN)] n · CH 3CN ( 2) and [Hg(μ-3-bpdb)(CH 3COO) 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, μ 1,1-bridge and μ 1,3-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).
Published Version
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