Benzotriyne
Benzotriyne or cyclocarbon is a hypothetical chemical compound, an allotrope of carbon with molecular formula C6. The molecule is a ring of six carbon atoms, connected by alternating triple and single bonds. It is, therefore, a potential member of the cyclocarbon|cyclocarbon family.
There have been a few attempts to synthesize benzotriyne, e.g. by pyrolysis of mellitic anhydride, but without success as of 2011.
Recent investigations have concluded that benzotriyne is unlikely to exist due to the large angle strain. A likely alternative isomer would be a cyclic cumulene called cyclohexahexaene, which should itself be a metastable species.
The name cracatene was suggested for this compound.
