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.
Electron micrograph of a linear carbon chain (carbyne) between a carbon lump and Fe electrode, approximately 36 nm wide image [3]
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. ISBN 0-7923-5323-4.
^Baughman, R. H. (2006). "CHEMISTRY: Dangerously Seeking Linear Carbon". Science. 312 (5776): 1009–1110. doi:10.1126/science.1125999. PMID 16709775. S2CID 93868586.
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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. PMID 16240306.
^Cite error: The named reference kroto was invoked but never defined (see the help page).
and 28 Related for: Linear acetylenic carbon information
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phosphine. As an alkyne, acetylene is unsaturated because its two carbon atoms are bonded together in a triple bond. The carbon–carbon triple bond places all...
lonsdaleite, glassy carbon, carbon nanofoam and linearacetyleniccarbon (carbyne). Graphene is a two-dimensional sheet of carbon with the atoms arranged...
allotropes of carbon include diamond (the carbon atoms are bonded together to form a cubic lattice of tetrahedra), graphite (the carbon atoms are bonded...
has been considered to have a carbyne structure, the linearacetyleniccarbon allotrope of carbon. A later report has called this identification, and the...
or O=C=C=O) and other linear or cyclic polymers of carbon monoxide (-CO-)n (polyketones), and linear or cyclic polymers of carbon dioxide (-CO2-)n, such...
Laboratoire Aimé-Cotton, French research laboratory Linearacetyleniccarbon, a polymeric carbon chain Location Area Code, a unique 16-digit fixed length...
symmetry of a carbon dioxide molecule is linear and centrosymmetric at its equilibrium geometry. The length of the carbon–oxygen bond in carbon dioxide is...
triple bond. The most important linear molecule with more than three atoms is acetylene (H−C≡C−H), in which each of its carbon atoms is considered to be a...
matter, will be used instead, together with a pre-filter and activated carbon. It is claimed the tower will filter air for up to 75,000 people within...
organic chemistry, an alkene, or olefin, is a hydrocarbon containing a carbon–carbon double bond. The double bond may be internal or in the terminal position...
hydrocarbon is an organic compound consisting entirely of hydrogen and carbon.: 620 Hydrocarbons are examples of group 14 hydrides. Hydrocarbons are...
Han-Chao Wei; Battle, Scott L.; et al. (1995). "Synthesis of linearacetyleniccarbon: The "sp" carbon allotrope". Science. 267 (5196): 362–7. Bibcode:1995Sci...
consists of one carbon atom and one oxygen atom connected by a triple bond. It is the simplest carbon oxide. In coordination complexes, the carbon monoxide ligand...
formed from equivalent orbitals on the carbon. A set of four equivalent orbitals can be obtained that are linear combinations of the valence-shell (core...
has a maximum at the bond site. Diatomic carbon will react with acetone and acetaldehyde to produce acetylene by two different pathways. Triplet C2 molecules...
also called carbon subnitride or but-2-ynedinitrile (IUPAC), is a compound of carbon and nitrogen with chemical formula C4N2. It has a linear molecular...
1996-11-19 Reppe, Walter; Kutepow, N & Magin, A (1969). "Cyclization of Acetylenic Compounds". Angewandte Chemie International Edition in English. 8 (10):...
Otherwise, if a diatomic molecule consists of two different atoms, such as carbon monoxide (CO) or nitric oxide (NO), the molecule is said to be heteronuclear...
compound with the linear formula O=C=S. It is a colorless flammable gas with an unpleasant odor.[not verified in body] It is a linear molecule consisting...
number of hydrogen atoms required to give the carbon atom these indicated properties. Optionally, acetylenic and formyl hydrogens can be shown explicitly...
Graphene (/ˈɡræfiːn/) is an allotrope of carbon consisting of a single layer of atoms arranged in a hexagonal lattice nanostructure. The name is derived...
Carbon monosulfide is a chemical compound with the formula CS. This diatomic molecule is the sulfur analogue of carbon monoxide, and is unstable as a solid...
hybridization. In the case of acetylene, each carbon atom has two sp-orbitals and two p-orbitals. The two sp-orbitals are linear, with 180° bond angles, and...
reported acetylene polymers was named Cuprene. Its highly cross-linked nature led to no further studies in the field for quite some time. Linear polyacetylene...
Whiting, M. C. (1954). "Researches on acetylenic compounds. Part XLVII. The prototropic rearrangements of some acetylenic dicarboxylic acids". Journal of the...
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