This article is about chains of repeating alkyne units. For other uses of "carbyne", see Carbyne (disambiguation).
Linear acetylenic carbon (LAC), also known as carbyne or Linear Carbon Chain (LCC), is an allotrope of carbon that has the chemical structure (−C≡C−)n as a repeat unit, with alternating single and triple bonds.[1][2] It would thus be the ultimate member of the polyyne family.
This polymeric carbyne is of considerable interest to nanotechnology as its Young's modulus is 32.7 TPa – forty times that of diamond;[4] this extraordinary number is, however, based on a novel definition of cross-sectional area that does not correspond to the space occupied by the structure. Carbyne has also been identified in interstellar space; however, its existence in condensed phases has been contested recently, as such chains would crosslink exothermically (and perhaps explosively) if they approached each other.[5]
^Kudryavtsev, Yu P. (1999). "The Discovery of Carbyne". In Heimann, Robert B.; Evsyukov, Sergey E.; Kavan, Ladislav (eds.). Carbyne and Carbynoid Structures. Physics and Chemistry of Materials with Low-Dimensional Structures. Vol. 21. Dordrecht, The Netherlands: Springer. pp. 1–6. doi:10.1007/978-94-011-4742-2_1. ISBN0-7923-5323-4.
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Itzhaki, L.; Altus, E.; Basch, H.; Hoz, S. (2005). "Harder than Diamond: Determining the Cross-Sectional Area and Young's Modulus of Molecular Rods". Angewandte Chemie. 117 (45): 7598. Bibcode:2005AngCh.117.7598I. doi:10.1002/ange.200502448. Itzhaki, L.; Altus, E.; Basch, H.; Hoz, S. (2005). "Harder than Diamond: Determining the Cross-Sectional Area and Young's Modulus of Molecular Rods". Angewandte Chemie International Edition. 44 (45): 7432–7435. doi:10.1002/anie.200502448. PMID16240306.
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