World Library  
Flag as Inappropriate
Email this Article

Hexatriynyl radical

Article Id: WHEBN0008277761
Reproduction Date:

Title: Hexatriynyl radical  
Author: World Heritage Encyclopedia
Language: English
Subject: Octatetraynyl radical, Free radicals, Methanol, Diazenylium, Methyl isocyanide
Publisher: World Heritage Encyclopedia

Hexatriynyl radical

Hexatriynyl radical
ChemSpider  YesY
Jmol-3D images Image 1
Molecular formula C6H
Molar mass 73.07 g mol−1
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 YesY   YesY/N?)

The hexatriynyl radical, C6H, is an organic radical molecule consisting of a chain of six carbon atoms terminated by a hydrogen.

The unpaired electron is located at the opposite end to the hydrogen atom, as indicated. Both experimental work and computer simulations on this species was done in the early 1990s.[1][2]

Synthesis of the radical

The radical can be synthesized by photolysis. Two different examples involve

Hexatriyne anion

In 2006 the negatively charged hexatriyne anion of this molecule, C6H, was the first negatively charged ion to be discovered to exist in the interstellar medium, using the Green Bank Telescope.[3] Negative ions were thought to be unstable in this environment due to the prevalence of ultraviolet light, which dislodges extra electrons such as this.

Synthesis of the anion

The laboratory synthesis starts from acetylene C2H2. The reaction takes place within a DC discharge at reduced pressure in a mixture with 15% argon. The product is observed by millimeter-wave spectroscopy.

Analogous species

The two species C4H and C8H have also been detected.


  1. ^ Doyle, T.J.; L.N. Shen, C.M.L. Rittby, and W.R.M. Graham (November 1, 1991). "A C≡C stretching vibration of the C6H (hexatriynyl) radical in Ar at 10 K".  
  2. ^ Liu, R.; X. Zhou; P. Pulay (July 15, 1992). "Ab initio study of the geometry, stretching, vibrations, and assignment of the observed frequencies of the ground state C6H (hexatriynyl) radical".  
  3. ^ McCarthy, M. C.; C. A. Gottlieb; H. Gupta; P. Thaddeus (December 1, 2006). "-H6"Laboratory and Astronomical Identification of the Negative Molecular Ion C (Abstract). The Astrophysical Journal 652 (2): L141–L144.  

See also

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.