Preparation of the Binary Technetium Bromides: TcBr3 and TcBr4

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• 作者：Frederic Poineau ; Efrain E. Rodriguez ; Paul M. Forster ; Alfred P. Sattelberger ; Anthony K. Cheetham ; Kenneth R. Czerwinski
• 刊名：Journal of the American Chemical Society
• 出版年：2009
• 出版时间：January 28, 2009
• 年：2009
• 卷：131
• 期：3
• 页码：910-911
• 全文大小：123K
• 年卷期：v.131,no.3(January 28, 2009)
• ISSN：1520-5126

文摘

TcBr₃ (1) and TcBr₄ (2) were synthesized by reaction of Tc metal with elemental bromine at 400 °C. Single crystal XRD measurements indicate that TcBr₃ crystallizes in the orthorhombic space group Pmmn (a = 11.0656(2) Å, b = 5.9717(1) Å, c = 6.3870(1) Å). The structure consists of infinite chains of face-sharing TcBr₆ octahedra with a regular alternation of short and long Tc−Tc distances (2.8283(4) Å, 3.1434(4) Å). TcBr₄ crystallizes in the orthorhombic space group Pbca (a = 6.3237(5) Å, b = 12.1777(9) Å, c = 14.7397(11) Å₎. TcBr₄ contains infinite chains of edge-sharing TcBr₆ octahedra with no apparent metal−metal bond (Tc−Tc = 3.7914(4) Å). Technetium tribromide is isomorphous with RuBr₃ and MoBr₃, while TcBr₄ is isomorphous with PtBr₄ and OsBr₄.