کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1335804 | 1500286 | 2013 | 12 صفحه PDF | دانلود رایگان |
A systematic studies on complex formation between Mn(II) ions, 2,3,5,6-tetra(2-pyridyl)pyrazine and halide or pseudohalide (N3−, NCS− and N(CN)2−) ligands have been carried out and the following complexes [Mn2(μ-Cl)2Cl2(tppz)2] (1), [Mn2Cl2(μ-N3-κN1)2(tppz)2] (2), [MnCl(SCN)(tppz)(H2O)]·H2O (3), [MnCl(dca)(tppz)(H2O)0.57(MeOH)0.47] (4), [Mn(NO3)2(tppz)(H2O)] (5), [Mn(N3)(NO3)(tppz)(H2O)] (6), [Mn(SCN)2(tppz)] (7) and [Mn(NO3)(dca)(tppz)]n (8) have been obtained. The compounds were characterized by elemental analysis, IR, EPR, magnetic measurements and X-ray analysis. Two of them (5 and 6) have been tested as catalysts in oxidation of alcohol to aldehydes/ketones using oxone (2KHSO5·KHSO4·K2SO4) as an oxidant under biphasic reaction conditions (CH2Cl2/H2O) and tetra-n-butylammonium bromide as phase transfer agent under air at room temperature and as catalysts in oxidation of sulfides to sulfoxides with UHP (urea hydrogen peroxide) as oxidant.
Several novel manganese(II) complexes of 2,3,5,6-tetra(2-pyridyl)pyrazine have been synthesised and characterised by means of elemental analysis, IR, EPR, magnetic measurements and single crystal X-ray analysis. Two of them, [Mn(NO3)2(tppz)(H2O)] and [Mn(N3)(NO3)(tppz)(H2O)], have been tested as catalysts in oxidation of alcohol to aldehydes/ketones using oxone (2KHSO5·KHSO4·K2SO4) as an oxidant under biphasic reaction conditions (CH2Cl2/H2O) and tetra-n-butylammonium bromide as phase transfer agent under air at room temperature and as catalysts in oxidation of sulfides to sulfoxides with UHP (urea hydrogen peroxide) as oxidant.Figure optionsDownload as PowerPoint slide
Journal: Polyhedron - Volume 53, 10 April 2013, Pages 132–143