From Me3SiC![[triple bond, length half m-dash]](https://www.rsc.org/images/entities/char_e007.gif)
C–CCSiMe3 and Ph2PCC–CCPPh2 diynes and vanadocene VCp2, homobimetallic vanadium d1–d1 complexes are synthesized and characterized by X-ray crystal structures of (Cp2V)2(1-2η:3-4η-RC![[double bond, length half m-dash]](https://www.rsc.org/images/entities/char_e006.gif)
C–CCR), (R = SiMe3 1 PPh2 2); magnetic moments of both complexes from 300 to 2 K indicate an antiferromagnetic J exchange coupling of –10.5 and –59.8 cm–1 for 1 and 2, respectively.
R. Choukroun, B. Donnadieu, I. Malfant, S. Haubrich, R. Frantz, C. Guerin and B. Henner, Chem. Commun., 1997, 2315 DOI: 10.1039/A704461E
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