Synthesis, Raman spectrum and crystal structure of [Ba(XeF₂)₄](PF₆)₂

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• 作者：Tina Bunič ; Melita Tramš ; ek ; Evgeny Goreshnik ; Boris Ž ; emva
• 关键词：Barium hexafluorophosphate(V) ; XeF₂ ligand ; Structure ; Raman spectrum
• 刊名：Solid State Sciences
• 出版年：2008
• 出版时间：November 2008
• 年：2008
• 卷：10
• 期：11
• 页码：1511-1516
• 全文大小：550 K

文摘

In the system BaF₂/PF₅/XeF₂/anhydrous hydrogen fluoride a new coordination compound, [Ba(XeF₂)₄](PF₆)₂, was isolated. The XeF₂ molecules are interacting as ligands directly with the Ba²⁺ cations. The compound crystallizes in the triclinic space group with a = 8.739(2) Å, b = 8.912(2) Å, c = 25.855(7) Å, α = 76.331(6), β = 83.085(6), γ = 81.212(6), V = 1926.2(8) Å³ at 200 K and Z = 4. The structure consists of two crystallographically independent barium atoms with the coordination numbers 10 and 12. The barium atoms and the bridging XeF₂ molecules form double layers which are further interconnected into the 3-D network by the weak XeF (PF₆⁻) interactions. The Raman spectrum of [Ba(XeF₂)₄](PF₆)₂ clearly shows the presence of bridging XeF₂ molecules.