3 years ago

L3C3P3: Tricarbontriphosphide Cage Radicals and Cations Stabilized by Cyclic (alkyl)(amino)carbenes

Guy Bertrand, Yuanfeng Hou, Zhongshu Li, Chen-Yong Su, Hansjörg Grützmacher, Alexander Hinz, Yaqi Li, Jeffrey Harmer
Alkynes usually oligomerize to give rings with a conjugated -electron system. In contrast, phosphaalkynes, R-CP, frequently give compounds with polycyclic structures which are thermodynamically more stable than the corresponding -conjugated isomers. Here we report the syntheses of the first C3P3 cages with either radical or cation ground states stabilized by cyclic (alkyl)(amino)carbenes (CAACs). These compounds may be considered as examples of tricarbontriphosphide coordinated by carbenes and are likely formed via trimerization of the corresponding mono-radicals CAAC-CP*. The mechanism for the formation of these tricarbontriphosphide cage radicals has been rationalized by a combination of experiments and DFT calculations.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201710099

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