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Title: | Syntheses, structures, and magnetic properties of dicyanamide bridged one-dimensional double chain and discrete dinuclear complexes of manganese(II) derived from 6,7-dimethyl-2,3-di(2-pyridyl)quinoxaline or 2,4,6-tri(2-pyridyl)-1,3,5-triazine |
Authors: | 魏和祥;Wei, Ho-hsiang;Hsu, G.Y.;Misra, P.;Cheng, Sheng-Chuan;Mohanta, Sasankasekhar |
Contributors: | 淡江大學化學學系 |
Keywords: | Dicyanamide;Magnetic properties;One-dimensional;Double chain;Dinuclear;Manganese(II) |
Date: | 2006-12-04 |
Issue Date: | 2009-12-01 |
Publisher: | Elsevier |
Abstract: | Syntheses, structures, and magnetic properties of two dicyanamide (dca) bridged compounds of manganese(II), [MnII(DMeDPQ)(μ1,5-dca)2]n (1) and View the MathML source[Mn2II(TPT)2(μ1,5-dca)2(H2O)2](ClO4)2(2), have been described (DMeDPQ = 6,7-dimethyl-2,3-di(2-pyridyl)quinoxaline; TPT = 2,4,6-tri(2-pyridyl)-1,3,5-triazine). While 2 is a discrete dinuclear compound, the structure of 1 is polymeric and consists of one-dimensional double chains. DMeDPQ and TPT behave here as bidentate and tridentate chelating ligands, respectively. The one-dimensional double chain structure in 1 is formed due to the dual existence of two single and two double end to end (μ1,5-, EE) dca ligands. In the case of 2, the metal centers are bridged by two double EE dca ligands. The variable-temperature magnetic susceptibility measurements of both compounds reveal that dicyanamide mediates a weak antiferromagnetic interaction between the metal centers. |
Relation: | Polyhedron 25(17), pp.3393-3398 |
DOI: | 10.1016/j.poly.2006.06.019 |
Appears in Collections: | [Graduate Institute & Department of Chemistry] Journal Article
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