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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Synthesis and EPR studies of porphyrazines with bulky substituents
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Synthesis and EPR studies of porphyrazines with bulky substituents

机译：具有大取代基的卟啉嗪的合成及EPR研究

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Magnesium porphyrazinate substituted with eight 4-tert-butylphenylthio-groups on the peripheral positions has been synthesized by cyclotetramerization of 1,2-bis(4-tert-butylphenylthio)maleonitrile in the presence of magnesium butanolate. The metal-free derivative was obtained by its treatment with trifluoroacetic acid and further reaction of this product with copper(II) acetate, zinc(II) acetate and cobalt(II) acetate led to the metal porphyrazinates (M = Cu, Zn, Co). These new compounds have been characterized by elemental analysis, together with FT-IR, H-1 NMR, UV-Vis spectral data. By using EPR technique, room temperature paramagnetic properties of Cu(II) doped porphyrazine sample as powder and solution forms were measured. The first-derivative EPR signals taken from as powder and solution forms shows that the sample is axially symmetric. The trend g(parallel to) > g(perpendicular to) > 2 indicates that the unpaired electron is located mainly in the d(x2-y2) orbital (B-2(1) as ground state). (C) 2008 Elsevier Ltd. All rights reserved.
机译：在丁醇镁的存在下，通过1，2-双（4-叔丁基苯硫基）马来腈的环四聚化反应，合成了在外围位置被八个4-叔丁基苯硫基取代的卟啉锌镁。通过用三氟乙酸处理获得无金属衍生物，并将该产物与乙酸铜（II），乙酸锌（II）和乙酸钴（II）进一步反应生成金属卟啉锌酸盐（M = Cu，Zn，Co ）。这些新化合物已通过元素分析，FT-IR，H-1 NMR，UV-Vis光谱数据进行了表征。通过使用EPR技术，测量了Cu（II）掺杂的卟啉嗪粉末和溶液形式的室温顺磁性能。粉末和溶液形式的一阶导数EPR信号表明样品是轴向对称的。趋势g（平行于）> g（垂直于）> 2表示未配对电子主要位于d（x2-y2）轨道（B-2（1）为基态）中。 （C）2008 Elsevier Ltd.保留所有权利。

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