| 醋酸铑(Ⅱ)与2-吡啶羧酸的反应研究 |
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| 引用本文： | 侯文明,崔浩,叶青松,刘伟平. 醋酸铑(Ⅱ)与2-吡啶羧酸的反应研究[J]. 贵金属, 2017, 38(Z1). DOI: 10.3969/j.issn.1004-0676.2017.z1.026 |
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| 作者姓名： | 侯文明 崔浩 叶青松 刘伟平 |
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| 作者单位： | 昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,昆明,650106 |
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| 基金项目： | 云南省院省校科技合作项目 |
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| 摘 要： | 醋酸铑(Ⅱ)与2-吡啶羧酸在水溶液中反应,并没有生成与吡啶基团配位该有的紫色或红色产物,而是生成一种绿色混合物。绿色混合物的乙醇溶液在空气中静置2个月时,被空气中的氧气缓慢氧化成单核的三(2-吡啶羧酸)合铑。X衍射单晶测试表明,三(2-吡啶羧酸)合铑为经式结构,同时晶体中含有一个结晶水分子,水分子通过氢键将相邻的2个三(2-吡啶羧酸)合铑分子连接成一维链状超分子,链状分子间又进一步通过吡啶环之间的强烈π-π作用堆积成三维结构。
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| 关 键 词： | 醋酸铑 吡啶羧酸 单晶结构 氧化反应 |
A Study on the Reaction Process of Dirhodium Tetraacetate and 2-Picolinic Acid |
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| HOU Wenming,CUI Hao,YE Qingsong,LIU Weiping. A Study on the Reaction Process of Dirhodium Tetraacetate and 2-Picolinic Acid[J]. Precious Metals, 2017, 38(Z1). DOI: 10.3969/j.issn.1004-0676.2017.z1.026 |
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| Authors: | HOU Wenming CUI Hao YE Qingsong LIU Weiping |
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| Abstract: | A green but not a purple or red product was obtained by reaction of dirhodium(Ⅱ) tetraacetate with 2-picolinic acid in an aqueous solution, indicated that the 2-picolinic acid are bound to the rhodium center through O atoms but not N atoms. While the ethanol solution of the green product was allowed to evaporate slowly in the air, it was oxidized to mer-rhodium(Ⅲ) trispicolinate, which was characterized by single-crystal X-ray diffraction, by the oxygen in the air within two months. There is one molecule of water of crystallization per molecule of rhodium(Ⅲ) trispicolinate complexes. The water molecule is hydrogen-bonded to two carboxylate oxygen atoms from two adjacent rhodium(Ⅲ) trispicolinate molecules, which links the rhodium(Ⅲ) trispicolinate molecules to form a chain supramolecular structure. The chains are further packed to a three-dimensional network by the π-π interactions of the rhodium(Ⅲ) trispicolinatemolecules between the neighboring pyridine rings. |
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| Keywords: | dirhodium tetraacetate picolinic acid single-crystal structure oxidation reaction |
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