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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Lewis basicity of relevant monoanions in a non-protogenic organic solvent using a zinc(II) Schiff-base complex as a reference Lewis acid
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Lewis basicity of relevant monoanions in a non-protogenic organic solvent using a zinc(II) Schiff-base complex as a reference Lewis acid

机译：使用锌（II）Schiff-Base络合物作为参考路易斯酸的非前进有机溶剂中相关单甘油中相关单甘蔗的碱度

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摘要

Anions are ubiquitous species playing a primary role in chemistry, whose reactivity is essentially dominated by their Lewis basicity. However, no Lewis basicity data, in terms of Gibbs energy, are reported in the literature. We report here the first Lewis basicity of relevant monoanions through the determination of binding constants for the formation of stable 1 : 1 adducts, using a ZnII Schiff-base complex, 1, as a reference Lewis acid. Binding constants for equilibrium reactions were achieved through a nonlinear regression analysis of the binding isotherms from spectrophotometric titration data. The Lewis acidic complex 1 is a proper reference species because it forms stable adducts with both neutral and charged Lewis bases, thus allowing ranking their Lewis basicity. Binding constants indicate generally a strong Lewis basicity for all involved anions, rivalling or exceeding that of the stronger neutral bases, such as primary amines or pyridine. The cyanide anion results to be the strongest Lewis base, while the nitrate is the weaker base within the present anion series. Moreover, even the weaker base anions behave as stronger bases than the most common non-protogenic coordinating solvents.
机译：阴离子是普遍存在的物种在化学中发挥着主要作用，其反应性基本上由他们的lewis碱性占主导地位。但是，在文献中报告了吉布斯能量方面没有刘易斯碱性数据。我们在这里报告了通过测定使用ZnII Schiff-Base络合物，1作为参考路易斯酸的形成稳定1：1加合物的结合常数，通过测定结合常数来报告相关单甘油的第一个碱度。通过从分光光度滴定数据的结合等温线的非线性回归分析来实现用于平衡反应的结合常数。 Lewis酸性复合物1是一种适当的参考物质，因为它形成了具有中性和带电的lewis碱的稳定加合物，因此允许排名其lewis碱度。结合常数通常表明，所有涉及的阴离子的强刘易斯碱度，竞争或超过较强的中性碱，例如伯胺或吡啶。氰化物的阴离子结果是最强的刘易斯基地，而硝酸盐是本发明阴离系列内的弱碱。此外，即使是较弱的基础阴离子也表现得比最常见的非过源性配位溶剂具有更强的碱。

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