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A trinuclear Mn(Ⅱ)coordination complex Mn_3(HEDTA)_2·10H_2O(EDTA=ethylene diamine tetraacetic acid)1 has been synthesized and characterized by X-ray crystal structure determination.In addition,IR spectrum,thermogravimetric analysis,electron paramagnetic resonance(EPR)spectra and magnetic susceptibility of this complex are discussed.X-ray determination indicates that six-and seven-coordinate modes between Mn(Ⅱ)and H_4EDTA exist alternately in 1.Furthermore, detailed discussion of magnetic ordering in the temperature range of 2~300 K reveals the antiferromagnetic interactions in the complex. 相似文献
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A trinudear Mn(II) coordination complex Mna (HEDTA)2-10H20 (EDTA=ethylene diamine tetraacetic acid) 1 has been synthesized and characterized by X-ray crystal structure determination. In addition, IR spectrum, thermogravimetric analysis, electron paramagnetic resonance (EPR) spectra and magnetic susceptibility of this complex are discussed. X-ray determination indicates that six- and seven-coordinate modes between Mn(Yl) and H4EDTA exist alternately in 1. Furthermore, detailed discussion of magnetic ordering in tile temperature range of 2-300 K reveals the antiferromagnetic interactions in the complex. 相似文献
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无公害鲜食葡萄的生产技术服务是昌吉市开展为农服务工作的任务之一。全市服务面积213万亩,其中红提葡萄1.3万亩,巨峰0.8万亩,其它品种 0.2万亩。为解决目前鲜食葡萄品质差,生产不规范等问题,我们通过深入调查、积极探索,按照工业化思维来经营农业产业的思路,提出公司+科技+基地+农户的模式组织生产,以此提高我市鲜 相似文献
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针对物理化学的课程特点,文章从如何结合学生专业讲述课程主要研究内容,如何结合课程系统性特点强调框架的重要性、如何将教学内容与实践结合,提高理论联系实践的能力等几个方面谈了教授物理化学的几点体会。 相似文献
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