Microwave spectroscopy of HCOO13CH3 in the second methyl torsional excited state

Kaori Kobayashi*, Takuro Kuwahara, Haruka Tachi, Yuki Urata, Shozo Tsunekawa, Naoto Hayashi, Hiroyuki Higuchi, Masaharu Fujitake, Nobukimi Ohashi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The new experimental results and analysis of the microwave spectra of HCOO13CH3 in the second methyl torsional excited state are reported. Pseudo-principal axis method (pseudo-PAM) was successfully applied to the normal methyl formate in the second torsional excited state and again applied to this isotopologue. We succeeded to assign 536 A-species transitions up to J = 33 and Ka = 15 and 417 E-species transitions up to J = 32 and Ka = 14. Thirty parameters were used to do the least-squares-analysis by using the pseudo-PAM Hamiltonian consisting of rotational, centrifugal distortion, and internal-rotational constants.

Original languageEnglish
Pages (from-to)50-53
Number of pages4
JournalJournal of Molecular Spectroscopy
Volume343
DOIs
StatePublished - 2018/01

Keywords

  • Internal rotation
  • Isotopologue
  • Methyl formate
  • Microwave spectroscopy
  • Pseudo-PAM method

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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