Dipole Moment of CS2 in its ã3A2 State

1975 ◽  
Vol 53 (16) ◽  
pp. 1579-1586 ◽  
Author(s):  
M. Larzillière ◽  
D. A. Ramsay
Keyword(s):  
Dipole Moment ◽  
Matrix Element ◽  
Vibrational State ◽  
Stark Effect ◽  
Ultraviolet Spectrum ◽  
Lower State ◽  
Diagonal Matrix Element ◽  
Near Ultraviolet ◽  
Systematic Discrepancy ◽  
Infrared Data

The Stark effect on the [Formula: see text] system of 12C32S2 has been investigated. The most pronounced effects involve the 270,27 and 261,26 rotational levels of the 140 vibrational state and the 290,29 and 281,28 rotational levels of the 050 vibrational state. These pairs of levels are nearly degenerate and are coupled by an off-diagonal matrix element in the presence of an electric field. An analysis of the Stark shifts and the shapes of the Stark broadened lines yields[Formula: see text]Comparison of these energy separations with values calculated from measurements in the near ultraviolet spectrum and lower state term values based primarily on infrared data reveals a systematic discrepancy of 0.022 cm−1.

OPTICAL OBSERVATIONS OF THE STARK EFFECT ON OH

1965 ◽  
Vol 43 (1) ◽  
pp. 144-154 ◽  
Author(s):  
D. H. Phelps ◽  
F. W. Dalby
Keyword(s):  
Dipole Moment ◽  
Electric Fields ◽  
Ground State ◽  
Vibrational State ◽  
Stark Effect ◽  
Ultraviolet Spectrum ◽  
Optical Observations ◽  
Excited Vibrational State ◽  
Vibrational Ground State ◽  
Forbidden Transitions

The ultraviolet spectrum of the OH molecule has been obtained in electric fields up to 64 000 volts per cm. Stark line splittings, broadenings, and field-induced parity-forbidden transitions have been observed. The electric dipole moment of OH in its electronic and vibrational ground state (X2Π) has been determined to be (1.727 ± 0.02) Debyes. The dipole moment in the first excited vibrational state has been found to be about 4% lower.

Elektrisches Dipolmoment von TlBr und TlJ

1971 ◽  
Vol 26 (11) ◽  
pp. 1809-1812 ◽  
Author(s):  
E. Tiemann
Keyword(s):  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Vibrational State ◽  
Stark Effect ◽  
Dipole Moments ◽  
Electric Dipole Moments ◽  
Ground Vibrational State ◽  
Rotational Transitions

Stark-effect measurements on pure rotational transitions of TlBr and Til are described. The derived electric dipole moments of the most abundant isotopic molecules on the ground vibrational state are:205TL79Br : | μ0| = (4.493 ± 0.050) D , 205Tl127 I | μ 0| =(4.607 ± 0.070) D .The electric dipole moment of 205Tl19F | μ 0|=4.2282 (8) D was used as standard.

High-Field Stark Effects on the Near Ultraviolet Spectrum of the Hydroxyl Radical

1971 ◽  
Vol 49 (22) ◽  
pp. 2825-2832 ◽  
Author(s):  
Ethan A. Scarl ◽  
F. W. Dalby
Keyword(s):  
Dipole Moment ◽  
Hydroxyl Radical ◽  
Electric Fields ◽  
High Field ◽  
Transition Probability ◽  
Ultraviolet Spectrum ◽  
Vibrational Transition ◽  
Near Ultraviolet ◽  
Stark Effects ◽  
Π State

Spectra due to the A2Σ+–X2Π transition of the hydroxyl radical in electric fields of over 300 000 V per cm have been obtained. The dipole moment of the A2Σ+ ν = 0 state of OH has been determined to be (1.98 ± 0.08) D. From the variation of the dipole moment with vibrational quantum number in the 2Π state, the transition probability for the pure vibrational transition ν = 1 →ν = 0 has been estimated to be A10 = 80s−1.

Microwave spectrum of allyl cyanide (CH2=CHCH2CN)

1968 ◽  
Vol 46 (8) ◽  
pp. 959-962 ◽  
Author(s):  
K. V. L. N. Sastry ◽  
V. M. Rao ◽  
S. C. Dass
Keyword(s):  
Dipole Moment ◽  
Vibrational State ◽  
Stark Effect ◽  
Microwave Spectrum ◽  
Effect Measurement ◽  
Rotational Constants ◽  
Molecular Dipole ◽  
Ground Vibrational State ◽  
Molecular Dipole Moment ◽  
Rotational Isomers

The microwave spectrum of allyl cyanide (3-butenonitrile) was studied in the region from 8 to 26 GHz. It was confirmed that this molecule exists in the two rotational isomers "cis" and "gauche". In the cis form, both a- and b-type transitions were assigned and the rotational constants in the ground vibrational state were calculated to be A = 11 323.01 + 0.08 MHz, B = 3739.20 ± 0.01 MHz, C = 2858.52 ± 0.01 MHz. The molecular dipole-moment components are μa = 3.26 ± 0.01 D, μb = 2.16 ± 0.05 D, and μt = 3.91 ± 0.03 D. For the gauche form, the a-type transitions were assigned and the rotational constants in the ground vibrational state are A = 17 295 MHz, B = 2619.91 ± 0.1 MHz, C = 2497.52 ± 0.1 MHz. The Stark effect measurement in this case gave the components of the dipole moment as μa = 3.69 ± 0.02 D, ub = 1.11 ± 0.06 D, μc = 0.98 ± 0.07 D, and μt = 3.98 ± 0.03 D.

Elektrisches dipolmoment von InCl / Electric dipole moment of incl

1972 ◽  
Vol 27 (5) ◽  
pp. 869-870 ◽  
Author(s):  
E. Tiemann ◽  
J. Hoeft ◽  
T. Törring
Keyword(s):  
Dipole Moment ◽  
Electric Field ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Vapour Pressure ◽  
Vibrational State ◽  
Stark Effect ◽  
Rotational Transition ◽  
Absorption Cell ◽  
Ground Vibrational State

AbstractStark-effect measurements on the rotational transition J = 1 → 2 of InCl are described. The vapour pressure in the absorption cell was chosen so that the quadrupole hyperfine structure due to the Cl-nucleus could not be resolved. Thus we neglect this coupling in the calculation of the Stark-effect. The derived electric dipole moment in the ground vibrational state is:115In35Cl : | μ0= (3.79 ± 0.10) D.The electric dipole moment of 205Tl19F : | μ0 | = 4.2282 (8) D was used for the calibration of the electric field

Improved Rotational Constants and Dipole Moment and a Nuclear Quadrupole Coupling Analysis of 2-Cyanothiophene and Dipole Moment of 2-Cyanofurane

1977 ◽  
Vol 32 (2) ◽  
pp. 152-155 ◽  
Author(s):  
J. Wiese ◽  
L. Engelbrecht ◽  
H. Dreizler
Keyword(s):  
Dipole Moment ◽  
Stark Effect ◽  
Dipole Moments ◽  
Quadrupole Coupling Constant ◽  
Rotational Constant ◽  
Coupling Constant ◽  
Frequency Range ◽  
Effect Analysis ◽  
Quadrupole Coupling ◽  
Nuclear Quadrupole

Results of a microwave investigation of the molecules 2-Cyanothiophene and 2-Cyanofurane are reported. The microwave spectrum of 2-Cyanothiophene was examined in the frequency range of 13 -40 GHz mainly to get a more accurate rotational constant A from the assignment of μb-btransitions. From the resolved hyperfine structure due to nuclear quadrupole coupling of the 14N-nucleus the quadrupole coupling constant X+=Xbb + Xcc was determined for 2-Cyanothiophene. No information for X- was available from the measured transitions.From Stark effect studies the dipole moments were determined for both molecules. The nuclear quadrupole coupling as a perturbation of the second order Stark effect was included in the Stark effect analysis

Highly accurate potential-energy and dipole moment surfaces for vibrational state calculations of methane

2006 ◽  
Vol 124 (6) ◽  
pp. 064311 ◽  
Author(s):  
Chikako Oyanagi ◽  
Kiyoshi Yagi ◽  
Tetsuya Taketsugu ◽  
Kimihiko Hirao
Keyword(s):  
Dipole Moment ◽  
Potential Energy ◽  
Vibrational State

scholarly journals Mikrowellenspektrum, Struktur, Dipolmoment und internes Hinderungspotential von Dimethyldisulfid

1965 ◽  
Vol 20 (12) ◽  
pp. 1676-1681 ◽  
Author(s):  
D. Sutter ◽  
H. Dreizler ◽  
H. D. Rudolph
Keyword(s):  
Perturbation Theory ◽  
Dipole Moment ◽  
Angular Momentum ◽  
Internal Rotation ◽  
Stark Effect ◽  
Order Perturbation ◽  
Frequency Range ◽  
First Order ◽  
Cross Terms ◽  
Second Order Perturbation Theory

The microwave spectra of CD3 —S —S —CD3 and CH3 —S —S—CH3 have been measured in the frequency range from 5.5 to 34 kmc/sec. From the six rotational constants an r0-structure has been calculated. STARK-effect measurements have been made for the 101 —110 and 202—211 rotational transitions of CH3—S—S—CH3. The dipole moment was calculated to be (1.985±0.01) Debye. An approximate value for the barrier to internal rotation of the two methyl tops is given, V3= (1.6±0.1) kcal. The calculation has been based on triplet splittings of the rotational lines using second order perturbation theory in the torsional wavefunctions and neglecting first order and cross terms in angular momentum.

The Microwave Spectrum of Silylisothiocyanate, SiH3NCS

1977 ◽  
Vol 32 (5) ◽  
pp. 473-481 ◽  
Author(s):  
K.-F. Dössel ◽  
D. H. Sutter
Keyword(s):  
Dipole Moment ◽  
Stark Effect ◽  
Heavy Atom ◽  
Quadrupole Coupling Constant ◽  
Rotational Transition ◽  
Coupling Constant ◽  
Bending Vibration ◽  
Isotopic Species ◽  
Quadrupole Coupling ◽  
Atom Chain

Abstract The microwave spectra of 15N-and 13C-substituted SiH3NCS were recorded in the frequency region between 8 and 40 GHz. Combining the resulting rotational constants with values obtained previously for other isotopic species, the complete restructure of the heavy atom chain could be determined. This leads to the following rs-bond distances: rC-S = l-5745 Å, rN-C = 1.2208 Å, and rSi-N = 1.6725 Å. From Stark effect splittings the electric dipole moment of the most abun­dant species was determined for the ground vibrational state and for the first excited state of the lowest frequency bending vibration ν10 . The values are <ν10=0 | μz | ν10=0> = 2.38 + 0.02 D and <ν10=1, l=1| μz | ν10=1, l=1>=2.36 ±0.02D. The direction of the dipole moment is discussed. From the quadrupole hyperfinestructure of the J = 2→J′=3 rotational transition the 14N-quadrupole coupling constant could be determined as Xzz=0.75 MHz. The experimental results are compared to CNDO/2 calculations.

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