The Millimeter- and Submillimeter-Wave Spectrum of Ethylene Oxide (c-C2H4O)
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Publisher:American Astronomical Society
Citation:J. Pan et al, "The Millimeter- and Submillimeter-Wave Spectrum of Ethylene Oxide (c-C2H4O)," The Astrophysical Journal 499, no. 1 (1998), doi:10.1086/305638
The cyclic molecule ethylene oxide (c-C_2 H_4 O) has recently been detected in the interstellar source Sgr B2N. Previous laboratory work on the rotational spectrum of this molecule extends only to a frequency of 123 GHz. We report here the extension of the laboratory rotational spectrum of this species through the frequency range 262-358 GHz using a new fast scan spectrometer (FASSST). The newly measured lines have been combined with previous data at lower frequencies to form a data set consisting of 662 lines that has been assigned and fitted via a standard semirigid asymmetric top analysis. The spectral constants obtained from the fit have allowed us to predict the frequencies of many additional lines.