Scholarlink

<p>Two halogenobismuthate salts of <span>l</span>-proline (<span>l</span>-Pro), (<span>l</span>-ProH)<sub>2</sub>(BiBr<sub>5</sub>) (<b>I</b>) (space group <i>P</i>2<sub>1</sub>2<sub>1</sub>2<sub>1</sub>) and [(<span>l</span>-ProH)<sub>3</sub><span>(l</span>-Pro)](BiI<sub>6</sub>) (<b>II</b>) (space group <i>P</i>2<sub>1</sub>) were synthesized. The structure determination showed that in salt (<b>I</b>), <span>l</span>-prolinium cations form an (A<sup>+</sup>···A<sup>+</sup>) type dimeric cation (<span>l</span>-ProH···<span>l</span>-ProH)(BiBr<sub>5</sub>). This is the first observation of such a dimeric unit for <span>l</span>-proline. The BiBr<sub>5</sub><sup>2−</sup> anion exhibits a polymeric chain structure. In the structure of salt (<b>II</b>), three <span>l</span>-prolinium cations are linked by strong hydrogen bonds with the carboxylate group of zwitterionic <span>l</span>-proline, thus forming a specific type of tetrameric cation [(<span>l</span>-ProH)<sub>3</sub>···<span>l-</span>Pro](BiI<sub>6</sub>). The BiI<sub>6</sub><sup>3−</sup> anion is discrete. Obtained crystals were characterized by infrared and Raman spectra. Their electronic structures were calculated by the DFT method based on their crystal arrangement and bandgaps were experimentally measured using powder diffuse reflectance spectroscopy.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Bromo- and iodobismuthates of l-proline with a (A+···A+) type dimeric and a new type of tetrameric cations

  • 期刊论文

  • 发表日期：

    2025年7月29日

查看全文
  • Aram M. Petrosyan,
  • Gerald Giester,
  • Ashkhen L. Zatikyan,
  • Vahram V. Ghazaryan

摘要

Two halogenobismuthate salts of l-proline (l-Pro), (l-ProH)2(BiBr5) (I) (space group P212121) and [(l-ProH)3(l-Pro)](BiI6) (II) (space group P21) were synthesized. The structure determination showed that in salt (I), l-prolinium cations form an (A+···A+) type dimeric cation (l-ProH···l-ProH)(BiBr5). This is the first observation of such a dimeric unit for l-proline. The BiBr52− anion exhibits a polymeric chain structure. In the structure of salt (II), three l-prolinium cations are linked by strong hydrogen bonds with the carboxylate group of zwitterionic l-proline, thus forming a specific type of tetrameric cation [(l-ProH)3···l-Pro](BiI6). The BiI63− anion is discrete. Obtained crystals were characterized by infrared and Raman spectra. Their electronic structures were calculated by the DFT method based on their crystal arrangement and bandgaps were experimentally measured using powder diffuse reflectance spectroscopy.