scholarly journals Study of Millimeter-Wave Rotational Spectra of Phosphorus Trifluoride in Ground,v2= 1 and v4= 1 States

2009 ◽  
Vol 6 (3) ◽  
pp. 849-865 ◽  
Author(s):  
Masoud Motamedi ◽  
Tahere Zohrevand
Keyword(s):  
Millimeter Wave ◽  
Ground State ◽  
Vibrational States ◽  
Rotational Spectra

The millimeter-wave rotational spectra of the ground and excited vibrational states v2=1 and v4=1 of the symmetric top molecule, PF3, have been analyzed again. The B0= 7819.9907(13) MHz, DJ= 7.84984(41) kHz, DJk= -11.7644 (11) kHz, HJ= 15.678 (36) mHz, HJk= -66.46 (12) mHz and HkJ= 87.42 (15) mHz have been determined for ground state. The 1=±1 series have been assigned and the rotational parameters including B4=7823.09212(41) MHz, (q+t)4= -29.49200(65) MHz, rt=2.9465 (13) MHz and (Cζ)4= -3010.94684(41) MHz for v4=1 state were determined accurately

scholarly journals Study of Millimeter-Wave Rotational Spectra ofTrioxane in Ground, v(A), v1(E) = 1 and v2(E) = 1 States

2009 ◽  
Vol 6 (s1) ◽  
pp. S259-S279 ◽  
Author(s):  
Masoud Motamedi ◽  
Najmehalsadat Khademi
Keyword(s):  
Excited State ◽  
Excited States ◽  
Millimeter Wave ◽  
Ground State ◽  
Vibrational States ◽  
Rotational Spectra ◽  
First Time

The millimeter-wave rotational spectra of the ground and excited vibrational states v(A), v1(E) =1 and v2(E ) =1 of the oblate symmetric top molecule, (CH2O)3, have been analyzed again. The B0= 5273.25747MHz, DJ= 1.334547 kHz, DJk= -2.0206 kHz, HJ(-1.01 mHz), HJK(-3.80 mHz), and HKJ(4.1 mHz) have been determined for ground state. For non degenerate excited state, vA(1), the B = 5260.227723 MHz and DJand DJKwere determined 1.27171 kHz and -1.8789 kHz respectively. The 1=±1 series have been assigned in two different excited states v1(E) =1 and v2(E) =1.Most of the parameters were determined with higher accuracy compare with before. For the v2(E) =1 state the Cζ=-1940.54(11) MHz and qJ= 0.0753 (97) kHz were determined for the first time.

scholarly journals New Investigation of Millimeter-Wave Rotational Spectrum of CCl3CN in Ground, v7= 1 and v8= 1 States

2008 ◽  
Vol 5 (4) ◽  
pp. 946-962
Author(s):  
Masoud Motamedi ◽  
Tahere Zohrevand
Keyword(s):  
Millimeter Wave ◽  
Ground State ◽  
Rotational Spectrum ◽  
Vibrational States ◽  
Rotational Spectra

The millimeter-wave rotational spectra of the ground and excited vibrational states v7=1 and v8=1 of the symmetric top molecule, CCl3CN, have been analyzed again. The B0= 1666.80894(13) MHz, DJ= 0.135023 (23) kHz, DJK= 0.60596 (45) kHz, HJ= -0.0192 (10) mHz, HJK= 1.188 (34) mHz and HKJ= -1.60 (21) mHz have been determined for ground state. The 𝓁 = ±1 series have been assigned and the rotational parameters including B7=1667.96659(25) MHz, (q+t)7=1.58855(94) MHz for v7=1 and B8=1667.08204 (31) MHz, (q+t)8= 1.6141(36) MHz for v8= 1 states were determined accurately.

Centrifugal Distortion Parameters of Fulminic Acid, HCNO, from the Millimeter-Wave Rotational Spectra

1971 ◽  
Vol 26 (1) ◽  
pp. 128-131 ◽  
Author(s):  
Manfred Winnewisser ◽  
Brenda P. Winnewisser
Keyword(s):  
Millimeter Wave ◽  
Ground State ◽  
Rotational Spectrum ◽  
Centrifugal Distortion ◽  
Vibrational States ◽  
Molecular Constants ◽  
Rotational Spectra ◽  
First Excited State ◽  
Bending Modes ◽  
Distortion Parameters

Abstract A newly designed millimeter-wave spectrometer has been employed for precise measurements of the millimeter-wave rotational spectrum of HCNO. Absorptions in several excited vibrational states as well as the ground state could be measured. The present paper presents the observed frequen­ cies and molecular constants obtained for the ground state and the first excited state of v4 and of v5, the vibrational bending modes

scholarly journals Millimeter Wave Spectrum and Centrifugal Distortion Analysis of Difluorochloromethane CHF2Cl in the Ground State

1990 ◽  
Vol 45 (9-10) ◽  
pp. 1165-1168 ◽  
Author(s):  
R. Spiehl ◽  
A. Guarnieri
Keyword(s):  
Millimeter Wave ◽  
Ground State ◽  
Wave Spectrum ◽  
Sixth Order ◽  
Centrifugal Distortion ◽  
Rotational Spectra ◽  
Vibrational Ground State ◽  
Distortion Analysis

Abstract The rotational spectra of CHF235Cl and CHF237Cl (CFC22) in the vibrational ground state between 42 and 214 GHz are reported. A centrifugal distortion analysis up to the sixth order is carried out.

Millimeter wave study of the ground state and several excited vibrational states of trioxane

1970 ◽  
Vol 34 (2) ◽  
pp. 190-205 ◽  
Author(s):  
Jean Bellet ◽  
Jean-Marcel Colmont ◽  
Jean Lemaire
Keyword(s):  
Millimeter Wave ◽  
Ground State ◽  
Vibrational States

Theoretical Study of Rotational Spectroscopy of Acetonitrile-d3in the Ground and Different Excited Vibrational States

2008 ◽  
Vol 5 (2) ◽  
pp. 201-218
Author(s):  
Motamedi Masoud ◽  
Moradi Parinaz
Keyword(s):  
Least Squares ◽  
Millimeter Wave ◽  
Theoretical Study ◽  
Rotational Spectroscopy ◽  
Accuracy Analysis ◽  
Centrifugal Distortion ◽  
Vibrational States ◽  
Rotational Spectra ◽  
Centrifugal Distortion Constants

The millimeter-wave rotational spectra of the ground and excited vibrational states v8= 1 and v8= 2 of the symmetric top molecule CD3CN have been analyzed again. Thel= ± 1 in v8=1,l= 0 andl= ± 2 series in v8= 2 states have been assigned respectively. The assignment and analysis of the measurements with a least – squares procedure have made it possible to obtain the rotational, quartic and sextic centrifugal distortion constants with more reliable and higher accuracy. Analysis of the v8= 2 state gave the following rotational parameters: Aζ = 62218.96 MHz and xll= 87527.70 MHz. Investigation in v8= 2 state indicates thatl-resonance is observed for this molecule aroundk=xℓℓ+(A−B)−2AζAζ−(A−B)≈4.

scholarly journals New Investigation of Millimeter-Wave Rotational Spectrum of CF3CN in the Excited Vibrational States v7=1 and v8=1

2007 ◽  
Vol 4 (1) ◽  
pp. 67-78
Author(s):  
Masoud Motamedi ◽  
Bahram Vahabzadeh Zargari
Keyword(s):  
Millimeter Wave ◽  
Rotational Spectrum ◽  
Vibrational States ◽  
Rotational Spectra

The millimeter-wave rotational spectra of the excited vibrational states v7=1 and v8=1 of the symmetric top molecule trifluoroacetonitrile, CF3CN, have been analyzed again. The ζ=±1 series have been assigned and the rotational parameters including B7=2944.9748(14) MHz, q+t=1.4505(16) MHz for v7=1 and B8=2950.4853(4) MHz, q+t= 3.6035(20) MHz for v8=1states were determined accurately.

scholarly journals The Microwave Spectrum of Fluoroacetylene in Ground and Vibrationally Excited States and Some Laser Enhancement Effects

1979 ◽  
Vol 34 (3) ◽  
pp. 340-352 ◽  
Author(s):  
Harold Jones ◽  
H. D. Rudolph
Keyword(s):  
Ground State ◽  
Microwave Spectrum ◽  
Vibrational States ◽  
Vibrationally Excited ◽  
Rotational Spectra ◽  
Wave Measurements ◽  
Anharmonicity Constant ◽  
Type V ◽  
First Time

Abstract The microwave spectrum of HCCF and DCCF has been investigated in all vibrational states with energy up to 1500 cm -1 . In the ground state and low-lying vibrational states mm-wave measurements up to 210 GHz were made. In some cases a detailed analysis of the vibrational state rotation spectrum including the effects of l-type resonance, and the determination of the anharmonicity constant gtt was possible. The rotational spectra of combination states of the type (vt = 2, vt′ = 1) were observed and partially analyzed, which is, to our knowledge, the first time this has been accomplished. The low-lying vibrational states of 13 C species of HCCF and DCCF were also observed. The 9.4 μm P(14) CO2-laser line was observed to produce a reduction in intensity in the ground state and an increase in intensity in the v3 = 1 excited state J = 0 → 1, 1 → 2, 2 3 transitions of DCCF.

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