===== On the Detection of Butadiynylidenesilylidyne ===== Six transitions of butadiynylidenesilylidyne with //J"// between 11 and 27 were detected in the circumstellar envelope of CW Leo (IRC +10216) with the 45 m radiotelescope of the Nobeyama Radio Observatory between 36 and 86 GHz:\\ M. Ohishi, N. Kaifu, K. Kawaguchi, A. Murakami, S. Saito, S. Yamamoto, S.-I. Ishikawa, Y. Fujita, Y. Shiratori, and W. M. Irvine,\\ **[[https://ui.adsabs.harvard.edu/abs/1989ApJ...345L..83O|Detection of a new Circumstellar Carbon Chain Molecule, C4Si]]**\\ //Astrophys. J.// **345**, L83–L86 (1989).\\ ---- Contributor(s): H. S. P. Müller; 08, 2010 ----