Reaction of (NC)2C![[double bond, length half m-dash]](https://www.rsc.org/images/entities/char_e006.gif)
C(Cl)Mo(CO)3C5H5 with diphenylacetylene in boiling benzene results in the cyclization of dicyanovinylidene with two diphenylacetylene units to give green 6,6-dicyano-1,2,3,4-tetraphenylfulvene.
R. B. King and M. S. Saran, J. Chem. Soc., Chem. Commun., 1974, 851 DOI: 10.1039/C39740000851
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