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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Non-trivial solution chemistry between amido-pyridylcalix[4]arenes and some metal salts
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Non-trivial solution chemistry between amido-pyridylcalix[4]arenes and some metal salts

机译：酰胺基吡啶杯[4]芳烃与某些金属盐之间的非平凡溶液化学

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Mercury ion complexation reactions were carried out between 3 and various mercury(ii) salts. ~1H NMR studies showed that the role of solvent, the anion chosen and the initial reaction conditions were critical and that the formation of a "simple" mercury(ii) complex was non-trivial. The mercury(ii) ion can cause either (i) the formation of an ion-pair system, which have a characteristic doubling of all signals in the ~1H NMR spectrum, (ii) a cleavage reaction to occur resulting in the reformation of the calix[4]arene diester compound 2, but only when the reaction is heated and (iii) "simple" mercury binding to the pyridine rings when the binding studies are carried out using NMR titration techniques. The electrochemistry results, on the same systems, show that the initial reaction involves the removal of the phenoxide protons followed by the resulting catalysis of the mercury species. This proton removal is not observed in the NMR spectra of any of the mercury reactions. It was also found that 3 could bind silver and zinc salts and was not selective for mercury(ii) as was previously described.
机译：汞离子络合反应在3种和多种汞（ii）盐之间进行。 〜1 H NMR研究表明，溶剂的作用，所选择的阴离子和初始反应条件是至关重要的，并且“简单”的汞（ii）配合物的形成是不重要的。汞（ii）离子可导致（i）形成离子对系统，该系统对〜1H NMR光谱中的所有信号具有特征性加倍的特征，（ii）发生裂解反应，导致氢键的重整杯[4]芳烃二酯化合物2，但仅当加热反应且（iii）当使用NMR滴定技术进行结合研究时，（iii）汞与吡啶环“简单”结合。在相同系统上的电化学结果表明，最初的反应涉及除去酚盐质子，然后催化汞物种。在任何汞反应的NMR光谱中均未观察到这种质子去除。还发现如前所述，3可以结合银盐和锌盐，并且对汞（ii）没有选择性。

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