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Benzotriyne Identifiers Jmol-3D images Image 1 SMILES C=1=C=C=C=C=C=1 InChI InChI=1S/C6/c1-2-4-6-5-3-1 Y Key: PXCDDPIOUAJVRE-UHFFFAOYSA-N Properties Molecular formula C6 Molar mass 72.06 g mol−1 Exact mass 72.000000000000 g mol-1 Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox references Benzotriyne or cyclo[6]carbon is a hypothetical chemical compound, an allotrope of carbon with molecular formula C6. The molecule is a ring of six carbon atoms, connected either by alternating triple and single bonds or by double bonds.[1] It is, therefore, a potential member of the cyclo[n]carbon family. There have been a few attempts to synthesize benzotriyne, e.g. by pyrolysis of mellitic anhydride,[2] but without success (as of 2011). Recent investigations have concluded that benzotriyne is unlikely to exist due to the large angle strain.[citation needed] A likely alternative would be a cyclical cumulene called cyclohexahexaene which, itself should be a metastable species. References ^ George A. Adamson and Charles W. Rees (1996). "Towards the total synthesis of cyclo[n]carbons and the generation of cyclo[6]carbon". J. Chem. Soc., Perkin Trans. 1 (13): 1535–1543. doi:10.1039/P19960001535.  ^ Ellis K. Fields, Seymour Meyerson (October 1966). "Arynes by Pyrolysis of Acid Anhydrides". J. Org. Chem. 31 (10): 3307–3309. doi:10.1021/jo01348a046.  This inorganic compound-related article is a stub. You can help Wikipedia by expanding it.v · d · e This article about an organic compound is a stub. You can help Wikipedia by expanding it.v · d · e v · d · eAllotropes of carbon sp3 forms Diamond (cubic) • Lonsdaleite (hexagonal diamond) sp2 forms Graphite • Graphene • Fullerenes (Buckminsterfullerene, Nanotubes) • Glassy carbon sp forms Linear acetylenic carbon mixed sp3/sp2 forms Amorphous carbon • Carbon nanofoam other forms C1 • C2 • C3 • C8 related Chaoite • Activated carbon • Carbon black • Charcoal • Carbon fiber • Aggregated diamond nanorod