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Octatetraynyl radical

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Organic radical (HC≡CC≡CC≡CC≡C•)

Octatetraynyl radical
Names
Skeletal formula of the octatetraynyl radical with the explicit hydrogen added
Preferred IUPAC name Octa-1,3,5,7-tetrayn-1-yl
Identifiers
3D model (JSmol)	Interactive image anion: Interactive image
ChemSpider	10809239^Y
PubChem CID	57417316 anion: 100986430
InChI InChI=1S/C8H/c1-3-5-7-8-6-4-2/h1H^Y Key: GTEOCQSGHJLKQX-UHFFFAOYSA-N^Y anion: InChI=1S/C8H/c1-3-5-7-8-6-4-2/h1H/q-1 Key: JPYHXIJMECKQLV-UHFFFAOYSA-N
SMILES [C]#CC#CC#CC#C anion: [C-]#CC#CC#CC#C
Properties
Chemical formula	C₈H
Molar mass	97.096 g·mol⁻¹
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). Y verify (what is ^YN ?) Infobox references

Chemical compound

Octatetraynyl radical (C₈H) is anorganic free radical with eightcarbon atoms linked in alinear chain with alternatingsingle bonds andtriple bonds (H−C≡C−C≡C−C≡C−C≡C•).

In 2007 negatively charged octatetraynyl was detected in Galactic molecular sourceTMC-1, making it the second type ofanion to be found in theinterstellar medium (afterhexatriynyl radical) and the largest such molecule detected to date.^[1]^[2]

References

[edit]

^Remijan, Anthony J.; J. M. Hollis; F. J. Lovas; M. A. Cordiner; T. J. Millar; A. J. Markwick-Kemper; P. R. Jewell (July 20, 2007)."Detection of C₈H⁻ and Comparison with C₈H toward IRC +10 216".The Astrophysical Journal.664 (1):L47 –L50.Bibcode:2007ApJ...664L..47R.doi:10.1086/520704.
^Brünken, S.; H. Gupta; C. A. Gottlieb; M. C. McCarthy; P. Thaddeus (July 20, 2007). "Detection of the Carbon Chain Negative Ion C₈H⁻ in TMC-1".The Astrophysical Journal.664 (1):L43 –L46.Bibcode:2007ApJ...664L..43B.doi:10.1086/520703.S2CID 120912943.

Molecules detected in outer space

Molecules

Diatomic	Aluminium monochloride Aluminium monofluoride Aluminium(II) oxide Argonium Carbon cation Carbon monophosphide Carbon monosulfide Carbon monoxide Cyano radical Diatomic carbon Fluoromethylidynium Helium hydride ion Hydrogen chloride Hydrogen fluoride Hydrogen (molecular) Hydroxyl radical Imidogen Iron(II) oxide Magnesium monohydride Methylidyne radical Nitric oxide Nitrogen (molecular) Oxygen (molecular) Phosphorus monoxide Phosphorus mononitride Potassium chloride Silicon carbide Silicon monoxide Silicon monosulfide Sodium chloride Sodium iodide Sulfanyl Sulfur mononitride Sulfur monoxide Titanium(II) oxide
Triatomic	Aluminium(I) hydroxide Aluminium isocyanide Amino radical Carbon dioxide Carbonyl sulfide CCP radical Chloronium Diazenylium Dicarbon monoxide Disilicon carbide Ethynyl radical Formyl radical Hydrogen cyanide (HCN) Hydrogen isocyanide (HNC) Hydrogen sulfide Hydroperoxyl Iron cyanide Isoformyl Magnesium cyanide Magnesium isocyanide Methylene Methylidynephosphane N₂H⁺ Nitrous oxide Nitroxyl Ozone Potassium cyanide Sodium cyanide Sodium hydroxide Silicon carbonitride c-Silicon dicarbide SiNC Sulfur dioxide Thioformyl Thioxoethenylidene Titanium dioxide Tricarbon Trihydrogen cation Water
Four atoms	Acetylene Ammonia Cyanoethynyl Formaldehyde Fulminic acid HCCN Hydrogen peroxide Hydromagnesium isocyanide Isocyanic acid Isothiocyanic acid Ketenyl Methyl cation Methyl radical Methylene amidogen Propynylidyne Protonated carbon dioxide Protonated hydrogen cyanide Silicon tricarbide Thiocyanic acid Thioformaldehyde Tricarbon monosulfide Tricarbon monoxide
Five atoms	Ammonium ion Butadiynyl Carbodiimide Cyanamide Cyanoacetylene Cyanoformaldehyde Cyanomethyl Cyclopropenylidene Formic acid Isocyanoacetylene Ketene Methane Methoxy radical Methylenimine Propadienylidene Protonated formaldehyde Silane Silicon-carbide cluster
Six atoms	Acetonitrile Cyanobutadiynyl radical Cyclopropenone Diacetylene E-Cyanomethanimine Ethylene Formamide HC₄N Ketenimine Methanethiol Methanol Methyl isocyanide Pentynylidyne Propynal Protonated cyanoacetylene
Seven atoms	Acetaldehyde Acrylonitrile Vinyl cyanide Cyanodiacetylene Ethylene oxide Glycolonitrile Hexatriynyl radical Methyl isocyanate Methylamine Propyne Vinyl alcohol
Eight atoms	Acetic acid Acrolein Aminoacetonitrile Cyanoallene Ethanimine Glycolaldehyde Hexapentaenylidene Methyl formate Methylcyanoacetylene
Nine atoms	Acetamide Cyanohexatriyne Dimethyl ether Ethanethiol Ethanol Methyldiacetylene N-Methylformamide Octatetraynyl radical Propene Propionitrile
Ten atoms or more	Acetone Benzene Benzonitrile Buckminsterfullerene (C₆₀, C₆₀⁺, fullerene, buckyball) Butyronitrile C₇₀ fullerene Cyanodecapentayne Ethyl formate Ethylene glycol Heptatrienyl radical Methyl acetate Methyl-cyano-diacetylene Methyltriacetylene Propionaldehyde Pyrimidine

Deuterated
molecules

Unconfirmed

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