Carboxonium Derivatives of closo-Decaborate Anion [2,6-B10H8O2CC6H4R]– Based on Aromatic Carboxylic Acids: Synthesis and Physicochemical Properties

IF 1.8 3区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Russian Journal of Inorganic Chemistry Pub Date : 2024-09-15 DOI:10.1134/s003602362460148x

A. V. Kolbunova, I. N. Klyukin, A. S. Kubasov, N. A. Selivanov, A. Yu. Bykov, A. P. Zhdanov, K. Yu. Zhizhin, N. T. Kuznetsov

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Abstract

The series of carboxonium derivatives of the closo-decaborate anion of the general form [2,6-B₁₀H₈O₂CC₆H₄R]^–, where R = F, CH₃, C₃H₇, and C₆H₅, were prepared. To obtain the target systems, the reaction between the [B₁₀H₁₁]^– anion and aromatic carboxylic acids was used. This process took place in two stages through the formation of a monosubstituted derivative of the general form [2-B₁₀H₉OC(OH)C₆H₄R]^–, where R = F, CH₃, C₃H₇, and C₆H₅, followed by intramolecular cyclization, leading to the formation of the target disubstituted carboxonium derivatives. The structure of the [2,6-B₁₀H₈O₂CC₆H₄-C₆H₅]^– anion was determined by single-crystal X-ray diffraction. The resulting carboxonium derivatives are capable of protonation to form neutral systems of the general form [2,6-B₁₀H₈O₂CC₆H₄R(H^fac)]⁰, where R = F, CH₃, C₃H₇, C₆H₅. When a protonated carboxonium derivative of acetonitrile is added to a solution, a trisubstituted derivative of the general form [B₁₀H₇O₂CC₆H₄R(NCCH₃)]⁰ is formed.

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基于芳香族羧酸的闭癸酸阴离子[2,6-B10H8O2CC6H4R]-羧基衍生物：合成与理化性质

摘要本研究制备了一系列一般形式为[2,6-B10H8O2CC6H4R]-（其中 R = F、CH3、C3H7 和 C6H5）的闭癸酸阴离子羧鎓衍生物。为了获得目标体系，[B10H11]- 阴离子与芳香族羧酸发生了反应。这一过程分为两个阶段，首先形成通式为[2-B10H9OC(OH)C6H4R]-的单取代衍生物，其中 R = F、CH3、C3H7 和 C6H5，然后进行分子内环化，最终形成目标二取代羧基衍生物。通过单晶 X 射线衍射确定了 [2,6-B10H8O2CC6H4-C6H5]- 阴离子的结构。由此得到的羧鎓衍生物能够质子化，形成一般形式为 [2,6-B10H8O2CC6H4R(Hfac)]0 的中性体系，其中 R = F、CH3、C3H7、C6H5。当质子化的乙腈羧基衍生物加入溶液中时，会形成一般形式为[B10H7O2CC6H4R(NCCH3)]0 的三取代衍生物。

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来源期刊

Russian Journal of Inorganic Chemistry 化学-无机化学与核化学

CiteScore

3.10

自引率

38.10%

发文量

237

审稿时长

3 months

期刊介绍： Russian Journal of Inorganic Chemistry is a monthly periodical that covers the following topics of research: the synthesis and properties of inorganic compounds, coordination compounds, physicochemical analysis of inorganic systems, theoretical inorganic chemistry, physical methods of investigation, chemistry of solutions, inorganic materials, and nanomaterials.