Metallacycloprop-1-enes can be constructed from coordinated alkynes. In this work, we report a convenient synthesis of fused osmacyclopropene complexes 1 and 3 from OsCl2(PPh3)3 and alkynylphenols. Paramagnetic alkyne-coordinated phenolate complexes 2 were obtained as the key intermediates for the formation of osmacyclopropenes, demonstrating selective C![[triple bond, length as m-dash]](https://www.rsc.org/images/entities/char_e002.gif)
C activation under different conditions.
B. Fu, W. Bai, Y. Zhao, Y. Li and W. Jiang, Chem. Commun., 2023, 59, 11085 DOI: 10.1039/D3CC03084A
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