Homolytic N鈥揌 Activation of Ammonia: Hydrogen Transfer of Parent Iridium Ammine, Amide, Imide, and Nitride Species

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• 作者：Markus G. Scheibel ; Josh Abbenseth ; Markus Kinauer ; Frank W. Heinemann ; Christian W眉rtele ; Bas de Bruin ; Sven Schneider
• 刊名：Inorganic Chemistry
• 出版年：2015
• 出版时间：October 5, 2015
• 年：2015
• 卷：54
• 期：19
• 页码：9290-9302
• 全文大小：877K
• ISSN：1520-510X

文摘

The redox series [Irⁿ(NH_x)(PNP)] (n = II鈥揑V, x = 3鈥?; PNP = N(CHCHPtBu₂)₂) was examined with respect to electron, proton, and hydrogen atom transfer steps. The experimental and computational results suggest that the Ir^III imido species [Ir(NH)(PNP)] is not stable but undergoes disproportionation to the respective Ir^II amido and Ir^IV nitrido species. N鈥揌 bond strengths are estimated upon reaction with hydrogen atom transfer reagents to rationalize this observation and are used to discuss the reactivity of these compounds toward E鈥揌 bond activation.