Octatetraynyl radical
Skeletal formula of the octatetraynyl radical with the explicit hydrogen added
Names
Preferred IUPAC name
Octa-1,3,5,7-tetrayn-1-yl
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/C8H/c1-3-5-7-8-6-4-2/h1H checkY
    Key: GTEOCQSGHJLKQX-UHFFFAOYSA-N checkY
  • [C]#CC#CC#CC#C
Properties
C8H
Molar mass 97.096 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

Octatetraynyl radical (C8H) is an organic free radical with eight carbon atoms linked in a linear chain with alternating single bonds and triple bonds (H−C≡C−C≡C−C≡C−C≡C•).

In 2007 negatively charged octatetraynyl was detected in Galactic molecular source TMC-1, making it the second type of anion to be found in the interstellar medium (after hexatriynyl radical) and the largest such molecule detected to date.[1][2]

References

  1. ^ 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.
  2. ^ 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.
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