Physics
Scientific paper
Aug 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jmosp.172..469o&link_type=abstract
Journal of Molecular Spectroscopy, Vol. 172, No. 2, p. 469 - 484
Physics
9
Organic Molecules: Interstellar Clouds
Scientific paper
The rotational-torsional spectrum of DCOOCH3, the symmetric, singly deuterated isotopomer of methyl formate, has been extended into the millimeter-wave and submillimeter-wave regions of the electromagnetic spectrum. A total of 885 lines belonging to the A and E torsional substrates of the ground (νt = 0) torsional state has been measured through rotational quantum number J = 30 up to a frequency of 377 GHz. These lines have been added to 27 previously measured microwave lines and the combined data set was analyzed using a global internal axis method. A root-mean-square deviation of 85 kHz has been obtained by varying 31 rotation and internal rotation parameters. The newly measured spectra reported should be useful for interstellar searches for DCOOCH3, which has yet to be detected unambiguously in interstellar clouds despite the existence of copious numbers of observed transitions for methyl formate.
de Lucia Frank C.
Ferguson David Walter
Herbst Eric
Oesterling Lee C.
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