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<p>The (H<sub>2</sub>dabco)[Cu<sup>II</sup>Br<sub>4</sub>] salt (dabco = 1,4-diazabicyclo[2.2.2]octane) was obtained and structurally characterized. The structure consists of isolated H<sub>2</sub>dabco<sup>2+</sup> cations and pseudo-tetrahedral Cu<sup>II</sup>Br<sub>4</sub><sup>2–</sup> anions linked via N–H…Br hydrogen bonds along the 001 direction. Because the β-angle is very close to 90°, the unit cell parameters were examined over a temperature range from 290 to 90&#xa0;K. No signs of a phase transition were observed. Strong distortion of the tetrahedral geometry of the Cu<sup>II</sup>Br<sub>4</sub><sup>2−</sup> anion was discussed. The Hirshfeld surface was constructed and analyzed to better understand the nature of weak interactions.</p> Graphical Abstract <p></p>

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Synthesis and Structural Characterization of (H2dabco)[CuIIBr4]

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月29日

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  • Evgeny Goreshnik,
  • Olha Panteleieva

摘要

The (H2dabco)[CuIIBr4] salt (dabco = 1,4-diazabicyclo[2.2.2]octane) was obtained and structurally characterized. The structure consists of isolated H2dabco2+ cations and pseudo-tetrahedral CuIIBr42– anions linked via N–H…Br hydrogen bonds along the 001 direction. Because the β-angle is very close to 90°, the unit cell parameters were examined over a temperature range from 290 to 90 K. No signs of a phase transition were observed. Strong distortion of the tetrahedral geometry of the CuIIBr42− anion was discussed. The Hirshfeld surface was constructed and analyzed to better understand the nature of weak interactions.

Graphical Abstract