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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Salts with the [NiBr3(L)]- complex anion (L = 1-methylimidazole, 1-methylbenzimidazole, quinoline, and triphenylphosphane) and low melting points: A comparative study
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Salts with the [NiBr3(L)]- complex anion (L = 1-methylimidazole, 1-methylbenzimidazole, quinoline, and triphenylphosphane) and low melting points: A comparative study

机译：具有[NiBr3（L）]-络合阴离子（L = 1-甲基咪唑，1-甲基苯并咪唑，喹啉和三苯基膦）和低熔点的盐：对比研究

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摘要

Four new salts with low melting points of the general formula (EMIm)[NiBr_3(L)] (EMIm = 1-ethyl- 3-methyl-imidazolium) with L = N-methylimidazole (NMIm), N-methylbenzimidazole (NMBIm), quinoline (quin), and triphenylphosphane (PPh_3) were prepared and characterized by means of elemental analysis, IR, NMR, and UV-vis spectroscopy. Magnetic properties were deduced from NMR data using the EVANS method. All four compounds are paramagnetic with magnetic moments close to the spin-only values of the tetrahedrally coordinated Ni(II) ion. Molecular and crystal structures were obtained by single crystal X-ray diffraction investigations. Melting points are determined to have values between 110° -C, (EMIm)[NiBr_3(NMIm)] and 168° -C, (EMIm)[NiBr_3(PPh_3)]. They exceed the maximum temperature required to call them "Ionic Liquids". Decomposition has been found to occur above 200° -C and to depend largely on the type of organic ligand coordinated to Ni(II).
机译：通式（EMIm）[NiBr_3（L）]（EMIm = 1-乙基-3-甲基咪唑鎓）的四种低熔点新盐，其中L = N-甲基咪唑（NMIm），N-甲基苯并咪唑（NMBIm），制备了喹啉（quin）和三苯基膦（PPh_3），并通过元素分析，IR，NMR和UV-vis光谱进行了表征。使用EVANS方法从NMR数据推论出磁性。所有这四种化合物都是顺磁性的，其磁矩接近于四面体配位的Ni（II）离子的自旋值。分子和晶体结构是通过单晶X射线衍射研究获得的。确定熔点的值在110℃-（EMIm）[NiBr_3（NMIm）]和168℃-（EMIm）[NiBr_3（PPh_3）]之间。它们超过了将其称为“离子液体”所需的最高温度。已经发现分解发生在高于200°C的温度下，并且很大程度上取决于与Ni（II）配位的有机配体的类型。

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