Rotational spectroscopy of isotopic oxirane, $c$-C${}_2$H${}_4$O

Abstract

We studied the rotational spectrum of oxirane in a sample of natural isotopic composition in selected regions between 158 GHz and 1093 GHz. Investigations of the isotopologs with one ${}^{13}$C or one ${}^{18}$O were the primary focus in order to facilitate searches for them in space. We also examined the main isotopic species mainly to look into the performance of Watson's A and S reductions both in an oblate and in a prolate representation. Even though oxirane is a rather asymmetric oblate rotor, the A reduction in the III${}^l$ representation did not yield a satisfactory fit, as was observed frequently earlier for other molecules. The other three combinations yielded satisfactory fits of similar quality among each other; the A reduction in the I${}^r$ representation required two parameters less than both S reduction fits.

arXiv comment11 pages, including tables and figure; minor update; J. Mol. Spectrosc., published

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• Laboratory spectroscopic study of isotopic thioformaldehyde, H${}_2$CS, and determination of its equilibrium structure
• Spectroscopic study and astronomical detection of doubly 13C-substituted ethyl cyanide
• Rotational spectroscopy of isotopic cyclopropenone, $c$-H${}_2$C${}_3$O, and determination of its equilibrium structure
• Rotational spectrum of isotopic methyl mercaptan, (13)CH3SH, in the laboratory and towards Sagittarius B2(N2)

Cited by in corpus (12)

• A Search for Heterocycles in GOTHAM Observations of TMC-1
• Rotational spectroscopy of mono-deuterated oxirane ($c$-C${}_2$H${}_3$DO) and its detection towards IRAS 16293$-$2422 B
• Reexploring Molecular Complexity with ALMA: Insights into chemical differentiation from the molecular composition of hot cores in Sgr B2(N2)
• Millimetre and submillimetre spectroscopy of isobutene and its detection in the molecular cloud G+0.693
• Rotational spectroscopy of CH${}_3$OD with a reanalysis of CH${}_3$OD toward IRAS 16293$-$2422
• Rotational spectroscopy of oxirane-\textit{2,2}-$d_2$, $c$-CD${}_2$CH${}_2$O, and its tentative detection toward IRAS 16293$-$2422~B
• Investigation of the rotational spectrum of CD${}_3$OD and an astronomical search toward IRAS 16293$-$2422
• The salty emission of the intermediate-mass AGB star OH 30.1 -0.7
• Rotation-tunneling spectrum and astrochemical modeling of dimethylamine, CH${}_3$NHCH${}_3$, and searches for it in space
• Leveraging MMW-MMW Double Resonance Spectroscopy to Understand the Pure Rotational Spectrum of Glycidaldehyde and 17 of Its Vibrationally Excited States
• Rotational spectroscopy of the thioformaldehyde isotopologues H${}_2$CS and H${}_2$C${}^{34}$S in four interacting excited vibrational states and an account on the rotational spectrum of thioketene, H${}_2$CCS
• Investigation of the rotational spectrum of CH${}_3$${}^{17}$OH and its tentative detection toward Sagittarius B2(N)