An Unprecedented Tetranuclear Niobium Aqua Ion with a Capping 4-Sulfido Ligand

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• 作者：Bee-Lean Ooi ; Inger S//pubs.acs.org/images/gifchars/oslash.gif" border="0">tofte ; Maja F. Bendtsen ; Astrid Munch ; Loa C. Nielsen ; and Jonas Henriksen
• 刊名：Inorganic Chemistry
• 出版年：2005
• 出版时间：February 7, 2005
• 年：2005
• 卷：44
• 期：3
• 页码：480 - 482
• 全文大小：57K
• 年卷期：v.44,no.3(February 7, 2005)
• ISSN：1520-510X

文摘

The aqueous solution chemistry of niobium is rather unexplored,and well characterized aqua complexes are scarce. In this work,a new niobium aqua ion is obtained upon treatment of Zn-reducedethanolic solutions of NbCl₅ with HCl in the presence of a sulfidesource. The red aqua ion, obtained upon cation-exchangechromatography, forms readily the thiocyanate complex which hasbeen crystallized as Cs_4.26Na_1.74[Nb₄SO₅(NCS)₁₀]·0.33H₂O. X-raycrystallography revealed an unprecedented metal-metal bondedtetranuclear Nb₄(₄-S)(₂-O)₅⁴⁺ core with a capping ₄-S ligand.