April 2017


Methyltriacetylene (CH3C6H) was identified by Remijan et al. toward Taurus Molecular Cloud 1 (TMC-1), as reported in 2006. The detection was based on 10 rotational lines observed with the Green Bank telescope. No subsequent observations of methyltriacetylene have been reported to date.

Researcher Links
AJ Remijan
JM Hollis
LE Snyder
PR Jewell
FJ Lovas

Methyltriacetylene or 1,3,5-heptatriyne is the third in the series of methyl-terminated mono- and polyacetylene (or polyyne) compounds, CH3-(C≡C)n-H, to be discovered in space, after methylacetylene (n=1) and methyldiacetylene (n=2). Experimental spectra of methyltetraacetylene (n=4) and methylpentaacetlyene (n=5) were characterized by Travers et al., while spectra of methylhexaacetylene (n=6) and methylheptaacetylene (n=7) were measured by Chen et al.. Theoretically, rotational constants have been calculated all the way out to for n=10 by Etim and Arunan.

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