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The submillimeter-wave spectrum of the doubly deuterated species of methyl formate HCOOCD2H

Abstract : Context. Astronomical surveys of interstellar molecules, such as those that will be available with the very sensitive ALMA telescope, require preliminary laboratory investigations of the microwave and submillimeter-wave spectra of new molecular species to identify these in the interstellar media. Aims: We build a linelist that should allow us to detect HCOOCD2H, provided it is present in the interstellar media in a suitable concentration. Methods: The experimental spectra of HCOOCD2H have been recorded in the microwave and submillimeter-wave energy range. Line frequencies were analyzed using an internal axis method-like treatment taking into account the CD2H internal rotation. Results: 5933 lines of HCOOCD2H have been assigned and their frequencies were reproduced with a unitless standard deviation of 1.6. A linelist with calculated frequencies and intensities was built and spans the 50 - 660 GHz spectral region. The frequency accuracy is better than 0.1 MHz. Conclusions: The pure rotation spectrum of the CD2H-methyl formate isotopolog (HCOOCD2H) has been observed in laboratory for the first time. Tables 3, 6, and 10 are available at the CDS via anonymous ftp to ( or via
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Submitted on : Friday, November 15, 2013 - 10:09:35 AM
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L. H. Coudert, L. Margulès, T. R. Huet, R. A. Motiyenko, H. Møllendal, et al.. The submillimeter-wave spectrum of the doubly deuterated species of methyl formate HCOOCD2H. Astronomy and Astrophysics - A&A, EDP Sciences, 2012, 543, pp.A46/1-A46/6. ⟨10.1051/0004-6361/201219120⟩. ⟨hal-00904711⟩



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