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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Lead(ii) chloride ionic liquids and organic/inorganic hybrid materials-a study of chloroplumbate(ii) speciation
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Lead(ii) chloride ionic liquids and organic/inorganic hybrid materials-a study of chloroplumbate(ii) speciation

机译：氯化铅（ii）离子液体和有机/无机杂化材料-氯铅（ii）形态研究

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摘要

A range of chloroplumbate(ii) organic salts, based on the two cations, 1-ethyl-3-methylimidazolium and trihexyl(tetradecyl)phosphonium, was prepared by ionothermal synthesis. Depending on the structure of the organic cation and on the molar ratio of PbCl_2 in the product, χ_(PbCl2), the salts were room-temperature ionic liquids or crystalline organic/inorganic hybrid materials. The solids were studied using Raman spectroscopy; the crystal structure of [C_2mim]{PbCl_3} was determined and shown to contain 1D infinite chloroplumbate(ii) strands formed by edge-sharing tetragonal pyramids of pentacoordinate (PbCl_5) units. The liquids were analysed using ~(207)Pb NMR and Raman spectroscopies, as well as viscometry. Phase diagrams were constructed based on differential scanning calorimetry (DSC) measurements. Discrete anions: [PbCl_4]~(2-) and [PbCl _3]~-, were detected in the liquid state. The trichloroplumbate(ii) anion was shown to have a flexible structure due to the presence of a stereochemically-active lone pair. The relationship between the liquid phase anionic speciation and the structure of the corresponding crystalline products of ionothermal syntheses was discussed, and the data were compared with analogous tin(ii) systems.
机译：通过离子热合成法制备了一系列基于两个阳离子（1-乙基-3-甲基咪唑鎓和三己基（十四烷基）phosph）的氯铅酸盐（ii）有机盐。根据有机阳离子的结构和产物中PbCl_2的摩尔比χ_（PbCl2），这些盐是室温离子液体或结晶有机/无机杂化材料。使用拉曼光谱研究固体。确定了[C_2mim] {PbCl_3}的晶体结构，并显示其包含由五坐标（PbCl_5）单元的边共享四角锥形成的一维无限氯代铅酸盐（ii）链。使用〜（207）Pb NMR和拉曼光谱以及粘度测定法分析液体。相图是根据差示扫描量热法（DSC）测量结果构建的。离散阴离子：[PbCl_4]〜（2-）和[PbCl_3]〜-在液态下被检测到。由于存在立体化学活性孤对，三氯铅酸根（ii）阴离子显示具有柔性结构。讨论了液相阴离子形态与离子热合成相应晶体产物的结构之间的关系，并将数据与类似的锡（ii）体系进行了比较。

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