The Ground State of 13C12CH6 (Ethane) Derived from ν12 at 12.2 μm

✍ Scribed by M. Weber; W.E. Blass; D.C. Reuter; D.E. Jennings; J.J. Hillman

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 367 KB
• Volume: 159
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1993.1136

✦ Synopsis

From combination differences of observed transitions of the (\nu_{12}) fundamental of ({ }^{13} \mathrm{C}^{12} \mathrm{CH}{6}) molecular constants for the ground state have been determined for the first time at high resolution. The pure (\left[{ }^{13} \mathrm{C}\right]) ethane spectra have been obtained with the (1-\mathrm{m}) McMath FTS spectrometer at the Kitt Peak National Observatory at (0.0025 \mathrm{~cm}^{-1}) spectral resolution. Over 2000 transitions in the (12.2 \mu \mathrm{m}) region have been assigned. Torsional splitting due to internal rotation of the methyl groups similar to the (\nu{9}) fundamental of regular ethane observable in the same spectral region has been observed and partially assigned. Averaged over the torsional components, the results for the ground state are (B_{\mathrm{o}}=0.64858548(71), D_{\mathrm{o}}^{J}=0.99574(51) \times 10^{-6}). and (D_{0}^{J K}=2.596(14) \times) (10^{-6} \mathrm{~cm}^{-1}). 1993 Academic Press. Inc.