Synthesis and Isolation of [Fe@Ge10]3−: A Pentagonal Prismatic Zintl Ion Cage Encapsulating an Interstitial Iron Atom

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• 作者：Binbin Zhou^&#8224 ; ; Mark S. Denning^&#8224 ; ; Deborah L. Kays^‡ ; ; Jose M. Goicoechea*^&#8224 ;
• 刊名：Journal of the American Chemical Society
• 出版年：2009
• 出版时间：March 4, 2009
• 年：2009
• 卷：131
• 期：8
• 页码：2802-2803
• 全文大小：121K
• 年卷期：v.131,no.8(March 4, 2009)
• ISSN：1520-5126

文摘

Reaction of an ethylenediamine (en) solution of the Zintl phase precursor K₄Ge₉ with FeAr₂ (Ar = 2,6-Mes₂C₆H₃) in the presence of 2,2,2-crypt (4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane) yielded the endohedral Zintl ion [Fe@Ge₁₀]³⁻ (1) which was crystallographically characterized as a [K(2,2,2-crypt)]⁺ salt in [K(2,2,2-crypt)]₃[Fe@Ge₁₀]•2en. This unprecedented Zintl ion exhibits a pentagonal prismatic 10-atom germanium cage with an interstitial iron atom in the central cavity. Confirmation of the existence of the cluster anion in solution was corroborated by positive and negative ion mode electrospray mass spectrometry.