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Updated: Nov 24, 2025

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Nonbenzenoid aromaticity of 1-phosphafulvenes: synthesis of phosphacymantrenes
Yanjie Liu1, Rongqiang Tian1, Zheng Duan1
1College of Chemistry, Green Catalysis Center, International Phosphorus Laboratory, International Joint Research Laboratory for Functional Organophosphorus Materials of Henan Province, Zhengzhou University, No. 100 Science Avenue, Zhengzhou, Henan 450002, China. tianrq@zzu.edu.cn duanzheng@zzu.edu.cn.
Abstract:
The coordination chemistry of 1-phosphafulvenes was investigated by employing their [6 + 4] adducts or α-C2-bridged biphospholes as a precursor. Unbridged phosphacymantrenes arise from 1-phosphafulvenes via proton abstraction. α-C2-bridged biphosphacymantrenes are probably yielded by the reductive coupling of 1-phosphafulvene with Mn2(CO)10. The coordination behavior of 1-phosphafulvenes is comparable to that of pentafulvenes, which again demonstrates the phosphorus-carbon analogy in low-coordinate organophosphorus chemistry.
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