尾-Technetium Trichloride: Formation, Structure, and First-Principles Calculations

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• 作者：Frederic Poineau ; Erik V. Johnstone ; Philippe F. Weck ; Paul M. Forster ; Eunja Kim ; Kenneth R. Czerwinski ; Alfred P. Sattelberger
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：May 7, 2012
• 年：2012
• 卷：51
• 期：9
• 页码：4915-4917
• 全文大小：229K
• 年卷期：v.51,no.9(May 7, 2012)
• ISSN：1520-510X

文摘

A second polymorph of technetium trichloride, 尾-TcCl₃, has been identified from the reaction between Tc metal and Cl₂ gas. The structure of 尾-TcCl₃ consists of infinite layers of edge-sharing octahedra, similar to its MoCl₃ and RuCl₃ analogues. The Tc鈥揟c distance [2.861(3) 脜] between adjacent octahedra is indicative of metal鈥搈etal bonding. Earlier theoretical work predicted that 尾-TcCl₃ is less stable than 伪-TcCl₃. In agreement with the prediction, 尾-TcCl₃ slowly transforms into 伪-TcCl₃ (Tc₃Cl₉) over 16 days at 280 掳C.