Preparation, thermal properties, and structures of ionic plastic crystals with sandwich and half-sandwich Ru complexes

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書誌事項

公開日
2024-06-01
資源種別
journal article
権利情報
  • © 2024 The Author(s). Published by Elsevier B.V.
  • This is an open access article under the Creative Commons Attribution 4.0 International license
DOI
  • 10.1016/j.jorganchem.2024.123162
公開者
Elsevier B.V.

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説明

We have recently been investigating the phase behavior of salts of cationic sandwich complexes in pursuit of novel ionic plastic crystals (IPCs). In this study, we synthesized salts containing sandwich complexes [Ru(Cp)(C₆H₆)]X ([1]X; X = CPFSA⁻ (1,1,2,2,3,3-hexafluoropropane-1,3-disulfonimide), SbCl₆⁻) and half-sandwich complexes [Ru(Cp)(DMSO)₃]X ([2]X; X = CPFSA⁻, FSA⁻ ((FSO₂)₂N⁻), PF₆⁻). In addition, we examined their thermal properties and crystal structures. Among them, [1]CPFSA exhibited an IPC phase between 365 and 630 K, whereas the others did not undergo phase transitions at 123–403 K. The cations and anions were alternately arranged in the crystals of [1]X, whereas [2]X did not exhibit the alternating arrangement except for [2]PF₆. The results showed that alternating molecular arrangements are crucial for the IPC formation, although low symmetry of the ion environment and intermolecular steric hindrance may inhibit it.

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