Millimeter-wave spectroscopy of silene, CH2SiH2

Stephane Bailleux; Marcel Bogey; Hans Buerger; Radek Fajgar; Yuyan Liu; Josef Pola; Michael Senzlober

doi:10.1117/12.267755

3 March 1997 Millimeter-wave spectroscopy of silene, CH₂SiH₂

Stephane Bailleux, Marcel Bogey, Hans Buerger, Radek Fajgar, Yuyan Liu, Josef Pola, Michael Senzlober

Proceedings Volume 3090, 12th Symposium and School on High-Resolution Molecular Spectroscopy; (1997) https://doi.org/10.1117/12.267755
Event: 12th Symposium and School on High Resolution Molecular Spectroscopy, 1996, St. Petersburg, Russian Federation

Abstract

Free CH₂ equals SiH₂ (1) has been observed in the gas phase by millimeter wave spectroscopy. A total of 142 rotational lines of the ²⁸Si species were measured, the search being guided by recent ab initio calculations. The identification of the molecule has been confirmed by the observation of many isotopomers: H₂CSiD₂, H₂CSiHD, H₂C²⁹SiD₂ and D₂CSiH₂. The ab initio and experimental rotational constants of 1 with a planar C_2v structure agree within about 0.5%. Silene was produced by vacuum pyrolysis of Ar-seeded 5,6-bis (trifluoromethyl)-2-silabicyclo [2.2.2] octa-5,7-diene; it decomposes with a 1/e lifetime of the exponential decay at ambient temperature of 30 plus or minus 2 ms.

Citation Download Citation

Stephane Bailleux, Marcel Bogey, Hans Buerger, Radek Fajgar, Yuyan Liu, Josef Pola, and Michael Senzlober "Millimeter-wave spectroscopy of silene, CH₂SiH₂", Proc. SPIE 3090, 12th Symposium and School on High-Resolution Molecular Spectroscopy, (3 March 1997); https://doi.org/10.1117/12.267755

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