THE Z-1-CYANO-1,3-BUTADIENE (C5H5N) MILLIMETER-WAVE ROTATIONAL SPECTRUM OF THE GROUND VIBRATIONAL STATE AND FIRST TWO EXCITED VIBRATIONAL STATES (ν19 AND ν27): A MOLECULE OF ASTROCHEMICAL IMPORTANCE

Rotational transitions of 16012C32S and 16013C32S in the ground vibrational state and of 16012C32S in several excited states have been accurately measured in the millimeter wave region for a minimum of four different J values. The analysis of the measured frequencies leads to rotational constants for the following vibrational states: 0 00 0 of 16O13C32S and 0 00 0, 0 1 1c 0, 0 1 1d 0, 0 20 0, 0 22c 0, 0 22d 0, 0 00 1 of 16O12C32S. Since the two components of the 0 22 0 transitions were resolved, an analysis of the l-type resonance was carried out and the interval 0 22 0 - 0 20 0 has been determined to be -4.63(10) cm-1. The result is in good agreement with the presently available determination of this level from vibrational spectra.

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The Rotational Spectrum and Nuclear Quadrupole Coupling of CH35C1F2

Zeitschrift für Naturforschung A ◽

10.1515/zna-1996-1-219 ◽

1996 ◽

Vol 51 (1-2) ◽

pp. 129-132 ◽

Cited By ~ 6

Author(s):

Susana Blanco ◽

Alberto Lesarri ◽

Juan C. López ◽

José L. Alonso ◽

Antonio Guarnieri

Keyword(s):

Fourier Transform ◽

Vibrational State ◽

Frequency Region ◽

Coupling Constants ◽

Rotational Spectrum ◽

Frequency Range ◽

Vibrational States ◽

Ground Vibrational State ◽

Quadrupole Coupling ◽

Nuclear Quadrupole

Abstract The rotational spectrum of CH35CIF2 in the ground vibrational state has been measured in the frequency range 8-18 GHz using a waveguide Fourier transform microwave (FTMW) spectrometer in order to determine accurate nuclear quadrupole coupling constants. The spectra of the excited vibrational states ν5 = 1, ν6 = 1 and ν9 = 1 have been also observed and analyzed in the frequency region 8-250 GHz using FTMW, Stark, and source modulation spectrometers. Quadrupole coupling constants are also reported for these states.

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The Rotational Spectrum of Monothioformic Acid IV. cis- and trans-H13C(:O)SH and HC(:18O)SH

Zeitschrift für Naturforschung A ◽

10.1515/zna-1977-1005 ◽

1977 ◽

Vol 32 (10) ◽

pp. 1108-1118 ◽

Cited By ~ 4

Author(s):

William H. Hocking ◽

Gisbert Winnewisser

Keyword(s):

Millimeter Wave ◽

Vibrational State ◽

Wave Spectra ◽

Rotational Spectrum ◽

Centrifugal Distortion ◽

Ground Vibrational State ◽

Bond Angles ◽

Isotopic Species ◽

Cis And Trans ◽

Trans Structure

The microwave and millimeter wave spectra of two isotopically substituted species of monothioformic acid, H13COSH and HC18OSH. have been investigated. Over 60 rotational transitions in the ground vibrational state have been assigned and measured for both the eis and trans thiol rotamers. HC(:O)SH. of each isotopic species. Rotational constants and quartic centrifugal distortion comstants of H13COSH and HC18OSH have been determined from the observed spectra. These data have been combined with previously published results on HCOSH, DCOSH. HCOSD and HCO34SH to obtain complete substitutions structures for the planar eis and trans rotamers of HC(:O)SH. All of the in-plane bond angles as well as the SH distance are significantly different for the two rotamers. For the eis rotamer the HSC and HCS angles increase by more than 2°, the OCS angle decreases by more than 3°, and the SH bond shortens compared to the trans rotamer geometry. The eis structure is: r(C-H) = 1.104 ± 0.003 Å, r(C = O) 1.203 ± 0.003 Å. r(C-S) = 1.771 ± 0.003 Å, r(S-H) = 1.335 ± 0.002 Å, ∢(OCS) = 122.5° ± 0.3°, ∢(HSC) = 94.9° ± 0.2° and ∢(HCS) = 114.4° ± 0.2°; whereas the trans structure is: r(C-S) = 1.104 ± 0.003 Å. r(C = O) = 1.205 ± 0.003 Å, r(C-S) = 1.768 ± 0.003 Å, r(S-H) = 1.354 ± 0.002 Å. ∢(OCS) = 125.9° ± 0.3°, (HSC) = 92.5° ± 0.2° and ∢(HCS) = 111.0° ± 0.2°

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The Millimeter-Wave Rotational Spectrum and Coriolis Interaction in the Two Lowest Excited Vibrational States of CHClF2

Journal of Molecular Spectroscopy ◽

10.1006/jmsp.1995.1250 ◽

1995 ◽

Vol 173 (2) ◽

pp. 477-487 ◽

Cited By ~ 13

Author(s):

Z. Kisiel ◽

L. Pszczolkowski ◽

G. Cazzoli ◽

G. Cotti

Keyword(s):

Millimeter Wave ◽

Rotational Spectrum ◽

Vibrational States ◽

Coriolis Interaction

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The Hyperfine Structure in the Rotational Spectrum of CuCl

Zeitschrift für Naturforschung A ◽

10.1515/zna-1977-1221 ◽

1977 ◽

Vol 32 (12) ◽

pp. 1477-1479

Author(s):

E. Tiemann ◽

J. Hoeft

Keyword(s):

Hyperfine Structure ◽

Vibrational State ◽

Rotational Transition ◽

Coupling Constants ◽

Rotational Spectrum ◽

Ground Vibrational State ◽

Quadrupole Coupling ◽

Magnetic Spin ◽

Nuclear Quadrupole ◽

Rotational Coupling

Abstract The hyperfine structure of the rotational transition J = 1 ← 0 of 63Cu35Cl in the ground vibrational state was observed. The analysis resulted in the following nuclear quadrupole coupling constants: 63Cu: e q0 Q= +16.08(20) MHz; 35Cl: eq0 Q = - 32.25(15) MHz. The influence of the small magnetic spin rotational coupling of both nuclei on the hyperfine spectrum is discussed.

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Rotational spectrum and spectroscopic constants of the phosphine molecule in the ground vibrational state

Journal of Molecular Spectroscopy ◽

10.1016/0022-2852(81)90116-8 ◽

1981 ◽

Vol 86 (1) ◽

pp. 184-192 ◽

Cited By ~ 22

Author(s):

S.P. Belov ◽

A.V. Burenin ◽

L.I. Gershtein ◽

A.F. Krupnov ◽

V.N. Markov ◽

...

Keyword(s):

Vibrational State ◽

Spectroscopic Constants ◽

Rotational Spectrum ◽

Ground Vibrational State

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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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