Formation of extended polyiodides at large cation templates.

IF 0.7 4区化学 Q4 CHEMISTRY, MULTIDISCIPLINARY

Acta Crystallographica Section C Structural Chemistry Pub Date : 2024-07-01 Epub Date: 2024-05-13 DOI:10.1107/S2053229624004194

Alexander J Blake, Carlo Castellano, Vito Lippolis, Enrico Podda, Martin Schröder

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引用次数: 0

Abstract

By studying the structures of (μ-1,4,10,13-tetrathia-7,16-diazacyclooctadecane)bis[iodidopalladium(II)] diiodide penta(diiodine), [Pd₂I₂(C₁₂H₂₆N₂S₄)](I)₂·5I₂ or [Pd₂I₂([18]aneN₂S₄)](I)₂·(I₂)₅, and 4,7,13,16,21,24-hexaoxa-1,10-diazoniabicyclo[8.8.8]hexacosane triiodide iodide hemipenta(diiodine) dichloromethane monosolvate, C₁₈H₃₈N₂O₆²⁺·I₃^-·I^-·2.5I₂·CH₂Cl₂ or [H₂([2.2.2]cryptand)](I₃)(I)(I₂)_2.5·CH₂Cl₂, we confirm the structural variety of extended polyiodides achievable upon changing the shape, charge and dimensions of the cation template, by altering the synthetic strategy adopted and/or the experimental conditions. Although it is still often difficult to characterize discrete [I_2m+n]^n- polyiodides higher than I₃^- on the basis of structural parameters, such as I-I bond distances, FT-Raman spectroscopy appears to identify them as aggregates of I₂, I^- and (symmetric or slightly asymmetric) I₃^- building blocks linked by I...I interactions of varying strengths. However, because FT-Raman spectroscopy carries no information about the topological features of extended polyiodides, the two techniques should therefore be applied in combination to enhance the analysis of this kind of compounds.

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在大阳离子模板上形成扩展的聚碘化物。

通过研究(μ-1,4,10,13-四噻-7,16-二氮杂环十八烷)双[碘钯(II)]二碘化五(二碘)的结构、[Pd2I2(C12H26N2S4)](I)2-5I2 或 [Pd2I2([18]aneN2S4)](I)2-(I2)5，以及 4,7,13,16,21,24-六氧杂-1,10-二氮杂双环[8.8.8]hexacosane triiodide iodide hemipenta(diiodine) dichloromethane monosolvate, C18H38N2O62+-I3--I--2.5I2-CH2Cl2 或 [H2([2.2.2]cryptand)](I3)(I)(I2)2.5-CH2Cl2, 我们证实，通过改变所采用的合成策略和/或实验条件，改变阳离子模板的形状、电荷和尺寸，可以获得结构多样的扩展聚碘化物。虽然根据结构参数（如 I-I 键距离）来描述高于 I3- 的离散 [I2m+n]n- 聚碘化物通常仍然比较困难，但傅立叶变换拉曼光谱似乎可以确定它们是由 I2、I- 和（对称或轻微不对称）I3- 结构单元通过不同强度的 I...I 相互作用连接而成的聚合体。不过，由于傅立叶变换拉曼光谱无法提供有关扩展聚碘化物拓扑特征的信息，因此这两种技术应结合使用，以加强对此类化合物的分析。

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来源期刊

Acta Crystallographica Section C Structural Chemistry CHEMISTRY, MULTIDISCIPLINARYCRYSTALLOGRAPH-CRYSTALLOGRAPHY

CiteScore

1.60

自引率

12.50%

发文量

148

期刊介绍： Acta Crystallographica Section C: Structural Chemistry is continuing its transition to a journal that publishes exciting science with structural content, in particular, important results relating to the chemical sciences. Section C is the journal of choice for the rapid publication of articles that highlight interesting research facilitated by the determination, calculation or analysis of structures of any type, other than macromolecular structures. Articles that emphasize the science and the outcomes that were enabled by the study are particularly welcomed. Authors are encouraged to include mainstream science in their papers, thereby producing manuscripts that are substantial scientific well-rounded contributions that appeal to a broad community of readers and increase the profile of the authors.