Microwave spectroscopy of CD3SH in the first torsionally excited state

Kaori Kobayashi; Wataru Nakamura; Tatsuro Matsushima; Shozo Tsunekawa; Nobukimi Ohashi

doi:10.1016/j.molstruc.2020.128339

Microwave spectroscopy of CD₃SH in the first torsionally excited state

Kaori Kobayashi^*, Wataru Nakamura, Tatsuro Matsushima, Shozo Tsunekawa, Nobukimi Ohashi

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The CD₃SH molecule, an isotopologue of methyl mercaptan, may be detected in interstellar space with the aid of the new high-sensitivity telescopes. Following our previous microwave study for its ground vibrational state (J. Mol. Spectrosc. 337(2017) 32–36), that for the first torsionally excited state (the v_t = 1 torsional state) is reported. In the present study, 371 A-species transitions up to J = 46 and K_a = 7 and 317 E-species transitions up to J = 33 and K_a = 7 in the v_t = 1 torsional state were newly assigned. The transition frequency data were least-squares-analyzed by using the pseudo-principal axis method (PAM) Hamiltonian to determine 31 parameters consisting of rotational, centrifugal distortion, and internal-rotational constants.

Original language	English
Article number	128339
Journal	Journal of Molecular Structure
Volume	1217
DOIs	https://doi.org/10.1016/j.molstruc.2020.128339
State	Published - 2020/10/05

Keywords

CHSH
Methanethiol
Methyl internal rotation
Methyl mercaptan
Microwave spectroscopy
Pseudo-PAM method

ASJC Scopus subject areas

Analytical Chemistry
Spectroscopy
Organic Chemistry
Inorganic Chemistry

Access to Document

10.1016/j.molstruc.2020.128339

Cite this

@article{cec43880695940a1834e377ca22d7872,

title = "Microwave spectroscopy of CD3SH in the first torsionally excited state",

abstract = "The CD3SH molecule, an isotopologue of methyl mercaptan, may be detected in interstellar space with the aid of the new high-sensitivity telescopes. Following our previous microwave study for its ground vibrational state (J. Mol. Spectrosc. 337(2017) 32–36), that for the first torsionally excited state (the vt = 1 torsional state) is reported. In the present study, 371 A-species transitions up to J = 46 and Ka = 7 and 317 E-species transitions up to J = 33 and Ka = 7 in the vt = 1 torsional state were newly assigned. The transition frequency data were least-squares-analyzed by using the pseudo-principal axis method (PAM) Hamiltonian to determine 31 parameters consisting of rotational, centrifugal distortion, and internal-rotational constants.",

keywords = "CHSH, Methanethiol, Methyl internal rotation, Methyl mercaptan, Microwave spectroscopy, Pseudo-PAM method",

author = "Kaori Kobayashi and Wataru Nakamura and Tatsuro Matsushima and Shozo Tsunekawa and Nobukimi Ohashi",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = oct,

day = "5",

doi = "10.1016/j.molstruc.2020.128339",

language = "英語",

volume = "1217",

journal = "Journal of Molecular Structure",

issn = "0022-2860",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Microwave spectroscopy of CD3SH in the first torsionally excited state

AU - Kobayashi, Kaori

AU - Nakamura, Wataru

AU - Matsushima, Tatsuro

AU - Tsunekawa, Shozo

AU - Ohashi, Nobukimi

PY - 2020/10/5

Y1 - 2020/10/5

N2 - The CD3SH molecule, an isotopologue of methyl mercaptan, may be detected in interstellar space with the aid of the new high-sensitivity telescopes. Following our previous microwave study for its ground vibrational state (J. Mol. Spectrosc. 337(2017) 32–36), that for the first torsionally excited state (the vt = 1 torsional state) is reported. In the present study, 371 A-species transitions up to J = 46 and Ka = 7 and 317 E-species transitions up to J = 33 and Ka = 7 in the vt = 1 torsional state were newly assigned. The transition frequency data were least-squares-analyzed by using the pseudo-principal axis method (PAM) Hamiltonian to determine 31 parameters consisting of rotational, centrifugal distortion, and internal-rotational constants.

AB - The CD3SH molecule, an isotopologue of methyl mercaptan, may be detected in interstellar space with the aid of the new high-sensitivity telescopes. Following our previous microwave study for its ground vibrational state (J. Mol. Spectrosc. 337(2017) 32–36), that for the first torsionally excited state (the vt = 1 torsional state) is reported. In the present study, 371 A-species transitions up to J = 46 and Ka = 7 and 317 E-species transitions up to J = 33 and Ka = 7 in the vt = 1 torsional state were newly assigned. The transition frequency data were least-squares-analyzed by using the pseudo-principal axis method (PAM) Hamiltonian to determine 31 parameters consisting of rotational, centrifugal distortion, and internal-rotational constants.

KW - CHSH

KW - Methanethiol

KW - Methyl internal rotation

KW - Methyl mercaptan

KW - Microwave spectroscopy

KW - Pseudo-PAM method

UR - http://www.scopus.com/inward/record.url?scp=85084488488&partnerID=8YFLogxK

U2 - 10.1016/j.molstruc.2020.128339

DO - 10.1016/j.molstruc.2020.128339

M3 - 学術論文

AN - SCOPUS:85084488488

SN - 0022-2860

VL - 1217

JO - Journal of Molecular Structure

JF - Journal of Molecular Structure

M1 - 128339

ER -