Far infrared spectrum and spectroscopic constants of AsH3 in the ground state

The infrared spectrum of isocyanic acid, HNCO, has been recorded in the range 8–80 cm−1 with a resolution of about 0.004 cm−1a-type and b-type rotational transitions have been measured and assigned in the ground state and in the ν4 = 1, ν5 = 1, ν6 = 1, and ν5 = 2 vibrational states.Improved values of the ground state rotational and centrifugal distortion constants in the Ir S-reduced Hamiltonian of Watson have been obtained in a simultaneous analysis of our measurements and microwave, millimetre-wave, and far infrared data reported previously. Sub-band origins and effective spectroscopic constants have been determined for each excited vibrational state. An accurate value for the ν6 band origin, at 656.287 cm−1, has been deduced.

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Far-infrared spectrum and ground state constants of methyl amine

Journal of Molecular Spectroscopy ◽

10.1016/0022-2852(87)90249-9 ◽

1987 ◽

Vol 126 (2) ◽

pp. 443-459 ◽

Cited By ~ 63

Author(s):

Nobukimi Ohashi ◽

Kojiro Takagi ◽

Jon T. Hougen ◽

W.Bruce Olson ◽

Walter J. Lafferty

Keyword(s):

Infrared Spectrum ◽

Ground State ◽

Far Infrared ◽

Methyl Amine

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Ground state spectroscopic constants of isothiocyanic acid, HNCS, from its microwave and millimeter wave spectra combined with far infrared data

Journal of Molecular Spectroscopy ◽

10.1016/0022-2852(79)90001-8 ◽

1979 ◽

Vol 78 (2) ◽

pp. 189-202 ◽

Cited By ~ 22

Author(s):

Koichi Yamada ◽

Manfred Winnewisser ◽

Gisbert Winnewisser ◽

L.B. Szalanski ◽

M.C.L. Gerry

Keyword(s):

Millimeter Wave ◽

Ground State ◽

Far Infrared ◽

Spectroscopic Constants ◽

Wave Spectra ◽

Infrared Data

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The Submillimeter-wave Spectrum of the Formaldehyde Isotopomer H2C18O in its Ground Vibrational State

Zeitschrift für Naturforschung A ◽

10.1515/zna-2000-0502 ◽

2000 ◽

Vol 55 (5) ◽

pp. 486-490 ◽

Cited By ~ 4

Author(s):

Holger S. P. Müller ◽

Ralf Gendriesch ◽

Frank Lewen ◽

Gisbert Winnewisser

Keyword(s):

Ground State ◽

Vibrational State ◽

Wave Spectrum ◽

Far Infrared ◽

Submillimeter Wave ◽

Spectroscopic Constants ◽

Published Data ◽

Rotational Spectrum ◽

Natural Isotopic Composition ◽

Ground Vibrational State

Abstract The ground state rotational spectrum of H2C18O has been studied between 485 and 835 GHz with a sample of natural isotopic composition. Additional lines have been recorded around 130 GHz and near 1.85 THz, using a recently developed far-infrared laser-sideband spectrometer. The accurate new line frequencies were fit together with previously published data to obtain greatly improved spectroscopic constants. Both Watson's S and A reduced Hamiltonians have been employed yielding the rotational constants AA = 281 961.215 (82), BA = 36 902.275 51 (36), CA = 32 513.405 89 (36), AA = 281 961.371 (82), BA = 36 904.173 32 (91), and CA = 32 511.524 65 (86) MHz, respectively.

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