On the Detection of Cyanopentadiyne in the ISM

Cyanopentadiyne, CH3C5N, also known as methylcyanodiacetylene, has been detected first by:
L. E. Snyder, T. L. Wilson, C. Henkel, P. R. Jewell, and C. M. Walmsley,
Detection of Interstellar Methylcyanodiacetylene in the Dark Dust Cloud TMC 1
Bull. Am. Atron. Soc. 16, 959 (1984).
Only three lines were detected, of which one apparently was blended. Therefore, this detection was deemed tentative.

More recently, the 100 m GBT was used to detect the J = 12 – 11 to 16 – 15 transitions with K = 0 and 1 between 18.6 and 24.9 GHz in emission, also toward TMC-1, by
L. E. Snyder, J. M. Hollis, P. R. Jewell, F. J. Lovas, and A. Remijan,
Confirmation of Interstellar Methylcyanodiacetylene;
Astrophys. J. 647, 412–417 (2006).

Contributor(s): H. S. P. Müller; 09, 2005; 08, 2006; 08, 2012