Unprecedented μ₃-Oⁱ face-capping ligand in a [Mo₆Brⁱ₆Lⁱ₂Br^a₆] (L = 0.5 O + 0.5 Br) mo

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• 作者：Kaplan Kirakci ; Sté ; phane Cordier and Christiane Perrin
• 关键词：Molybdenum octahedral cluster ; Oxyhalide compound ; Crystal structure ; Solid-state chemistry
  Mots-clé ; s ; Cluster octaé ; drique de molybdè ; ne ; Oxyhalogé ; nure ; Structure cristalline ; Chimie du solide
• 刊名：Comptes Rendus Chimie
• 出版年：2005
• 期刊代码：119_16310748
• 类别：ch
• 出版时间：2005
• 卷：8
• 期：11-12
• 页码：1712-1718
• 文件大小：288 K

摘要

The new Cs₃Mo₆Br₁₃O oxybromide, synthesized by solid-state chemistry, crystallizes in the trigonal system (Rme="mml2">method=retrieve&_udi=B6X18-4GMGWFS-6&_mathId=mml2&_user=10&_cdi=7236&_rdoc=3&_handle=V-WA-A-W-BY-MsSAYWW-UUA-U-AABZWDZAYY-AABBYCZEYY-CADVBBAYD-BY-U&_acct=C000050221&_version=1&_userid=10&md5=59e3be5e2e4ce3a38b97ef16d43d4d36">mg src="http://www.sciencedirect.com/cache/MiamiImageURL/B6X18-4GMGWFS-6-8/0?wchp=dGLbVtb-zSkzV" alt="Click to view the MathML source" align="absbottom" border="0" height=16 width=13>c space group; a = 15.5784(2) Å, c = 19.5103(5) Å, V = 4100.5(1) Å³ and Z = 6). It is based on a [Mo₆L₁₄] unit that contains an unprecedented μ₃ face-capping oxygen. The crystal structure determined by single crystal X-ray diffraction is built up from discrete face-capped [Mo₆Brⁱ₆Lⁱ₂Br^a₆]^3– (L = 0.5 O + 0.5 Br) anionic units in which two inner positions are randomly occupied by one bromine and one oxygen whereas the other ligand positions are fully occupied by bromine. The cesium cations randomly occupy two close crystallographic positions generated by the A-B-C-A′-B′-C′ close-packed stacking of the units. The cesium site occupancy is related to the random distribution of oxygen and bromine on the Lⁱ inner positions. To cite this article: K. Kirakci et al., C. R. Chimie 8 (2005).