High-Resolution Infrared and Microwave Study of the n20 and n21 Levels near 300 cm-1 in 1,2,4-Triazine.

F Hegelund; René Wugt Larsen; Bengt Nelander; D. Christen; M.H. Palmer

doi:10.1016/S0022-2852(02)00009-7

High-Resolution Infrared and Microwave Study of the n20 and n21 Levels near 300 cm-1 in 1,2,4-Triazine.

F Hegelund, René Wugt Larsen, Bengt Nelander, D. Christen, M.H. Palmer

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

Abstract

The gas phase far-IR spectrum of the small nu, Greek20 (A″, 367.88 cm−1) and small nu, Greek21 (A″, 311.28 cm−1) bands of 1,2,4-triazine, a five membered ring having the point group Cs, has been studied at a resolution ranging from 0.002 to 0.003 cm−1. From the MW spectrum 58 transitions in the small nu, Greek20 level and 64 in the small nu, Greek21 level have been assigned. The small nu, Greek20 and small nu, Greek21 modes which are due to non-planar motions of the ring system are found to be nearly unperturbed. From a simultaneous analysis of IR and MW transitions band centers, rotational constants, and the quartic centrifugal distortion constants ΔJ, ΔJK, ΔK, small delta, GreekJ, and small delta, GreekK have been obtained using the Watson Hamiltonian, A-reduction, IIIr-representation.

Original language	English
Pages (from-to)	9-18
Journal	Journal of Molecular Spectroscopy
Volume	217
Issue number	1
DOIs	https://doi.org/10.1016/S0022-2852(02)00009-7
Publication status	Published - 2003

Bibliographical note

The information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Chemical Physics (S) (011001060), Max-laboratory (011012005)

Subject classification (UKÄ)

Atom and Molecular Physics and Optics

Free keywords

1
2
4-Triazine
Infrared
Microwave
Rotational constants

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10.1016/S0022-2852(02)00009-7

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@article{b3c2696816064bb3ac9c30ba6d3e6736,

title = "High-Resolution Infrared and Microwave Study of the n20 and n21 Levels near 300 cm-1 in 1,2,4-Triazine.",

abstract = "The gas phase far-IR spectrum of the small nu, Greek20 (A″, 367.88 cm−1) and small nu, Greek21 (A″, 311.28 cm−1) bands of 1,2,4-triazine, a five membered ring having the point group Cs, has been studied at a resolution ranging from 0.002 to 0.003 cm−1. From the MW spectrum 58 transitions in the small nu, Greek20 level and 64 in the small nu, Greek21 level have been assigned. The small nu, Greek20 and small nu, Greek21 modes which are due to non-planar motions of the ring system are found to be nearly unperturbed. From a simultaneous analysis of IR and MW transitions band centers, rotational constants, and the quartic centrifugal distortion constants ΔJ, ΔJK, ΔK, small delta, GreekJ, and small delta, GreekK have been obtained using the Watson Hamiltonian, A-reduction, IIIr-representation.",

keywords = "1, 2, 4-Triazine, Infrared, Microwave, Rotational constants",

author = "F Hegelund and {Wugt Larsen}, Ren{\'e} and Bengt Nelander and D. Christen and M.H. Palmer",

note = "The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060), Max-laboratory (011012005)",

year = "2003",

doi = "10.1016/S0022-2852(02)00009-7",

language = "English",

volume = "217",

pages = "9--18",

journal = "Journal of Molecular Spectroscopy",

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TY - JOUR

T1 - High-Resolution Infrared and Microwave Study of the n20 and n21 Levels near 300 cm-1 in 1,2,4-Triazine.

AU - Hegelund, F

AU - Wugt Larsen, René

AU - Nelander, Bengt

AU - Christen, D.

AU - Palmer, M.H.

N1 - The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060), Max-laboratory (011012005)

PY - 2003

Y1 - 2003

N2 - The gas phase far-IR spectrum of the small nu, Greek20 (A″, 367.88 cm−1) and small nu, Greek21 (A″, 311.28 cm−1) bands of 1,2,4-triazine, a five membered ring having the point group Cs, has been studied at a resolution ranging from 0.002 to 0.003 cm−1. From the MW spectrum 58 transitions in the small nu, Greek20 level and 64 in the small nu, Greek21 level have been assigned. The small nu, Greek20 and small nu, Greek21 modes which are due to non-planar motions of the ring system are found to be nearly unperturbed. From a simultaneous analysis of IR and MW transitions band centers, rotational constants, and the quartic centrifugal distortion constants ΔJ, ΔJK, ΔK, small delta, GreekJ, and small delta, GreekK have been obtained using the Watson Hamiltonian, A-reduction, IIIr-representation.

AB - The gas phase far-IR spectrum of the small nu, Greek20 (A″, 367.88 cm−1) and small nu, Greek21 (A″, 311.28 cm−1) bands of 1,2,4-triazine, a five membered ring having the point group Cs, has been studied at a resolution ranging from 0.002 to 0.003 cm−1. From the MW spectrum 58 transitions in the small nu, Greek20 level and 64 in the small nu, Greek21 level have been assigned. The small nu, Greek20 and small nu, Greek21 modes which are due to non-planar motions of the ring system are found to be nearly unperturbed. From a simultaneous analysis of IR and MW transitions band centers, rotational constants, and the quartic centrifugal distortion constants ΔJ, ΔJK, ΔK, small delta, GreekJ, and small delta, GreekK have been obtained using the Watson Hamiltonian, A-reduction, IIIr-representation.

KW - 1

KW - 2

KW - 4-Triazine

KW - Infrared

KW - Microwave

KW - Rotational constants

U2 - 10.1016/S0022-2852(02)00009-7

DO - 10.1016/S0022-2852(02)00009-7

M3 - Article

SN - 0022-2852

VL - 217

SP - 9

EP - 18

JO - Journal of Molecular Spectroscopy

JF - Journal of Molecular Spectroscopy

IS - 1

ER -

High-Resolution Infrared and Microwave Study of the n20 and n21 Levels near 300 cm-1 in 1,2,4-Triazine.

Abstract

Bibliographical note

Subject classification (UKÄ)

Free keywords

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