Reversible Stereoisomerization of 1,3-Diphosphetane Frameworks Revealed by a Single-Electron Redox Approach.
作者： Xiaodan Chen , Cheng-Yong Su , Zhongshu Li , Zhongshu Li , Liu Leo Liu
DOI: 10.1021/ACS.INORGCHEM.1C00064
关键词:
摘要: The discovery of pyramidal inversion has continued to impact modern organic and organometallic chemistry. Sequential alkylation reactions an N-heterocyclic carbene (NHC) ligated dicarbondiphosphide 1 with RI (R = Me, Et, or iBu) ZnMe2 give rise the highly stereoselective synthesis cis-1,3-diphosphetanes 3. cis-3 is conformationally favorable at room temperature, whereas trans-3 observed 110 °C. One-electron oxidation Fc+(BArF) (Fc [Fe(C5H5)2]; BArF [B(3,5-(CF3)2C6H3)4)]-) leads formation trans-1,3-diphosphetane radical cation salts 3•+(BArF), which can be reversibly transformed upon one-electron reduction. Salts 3•+(BArF) represent first examples 1,3-diphosphetane cations. These results provide a potential application planar four-membered heterocycle-based building blocks for electrically fueled molecular switches.
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