Forbidden Rotational Transitions in the Microwave Spectrum of the Trans-Conformer of the Isopropyl Alcohol Molecule

2015 ◽  
Vol 82 (2) ◽  
pp. 298-302
Author(s):  
S. B. Kazimova
Keyword(s):  
Isopropyl Alcohol ◽  
Microwave Spectrum ◽  
Alcohol Molecule ◽  
Trans Conformer ◽  
Rotational Transitions

On the analysis of the gauche-form microwave spectrum of the isopropyl alcohol molecule

1991 ◽  
Vol 145 (2) ◽  
pp. 262-269 ◽  
Author(s):  
O.N Ulenikov ◽  
A.B Malikova ◽  
Ch.O Qagar ◽  
S.A Musaev ◽  
A.A Adilov ◽  
...  
Keyword(s):  
Isopropyl Alcohol ◽  
Microwave Spectrum ◽  
Alcohol Molecule

ChemInform Abstract: Analysis of the gauche-Form Microwave Spectrum of the Isopropyl Alcohol Molecule

ChemInform ◽  
2010 ◽  
Vol 22 (20) ◽  
pp. no-no
Author(s):  
O. N. ULENIKOV ◽  
A. B. MALIKOVA ◽  
CH. O. KADZHAR ◽  
S. A. MUSAEV ◽  
A. A. ADILOV ◽  
...  
Keyword(s):  
Isopropyl Alcohol ◽  
Microwave Spectrum ◽  
Alcohol Molecule

Zum Rotations-Zeeman-Effekt in Dimethylketen / Molecular Zeeman Effect and the Determination of the Molecular g Values, Paramagnetic Susceptibilities, and Molecular Quadrupole Moments in Dimethylketene

1972 ◽  
Vol 27 (4) ◽  
pp. 597-600 ◽  
Author(s):  
D. Sutter ◽  
L. Charpentier ◽  
H. Dreizler
Keyword(s):  
Magnetic Field ◽  
Zeeman Effect ◽  
Microwave Spectrum ◽  
Quadrupole Moments ◽  
Selection Rules ◽  
Rotational Transitions ◽  
The Magnetic Field

Abstract The rotational Zeeman-Effect in the microwave spectrum of dimethylketene was investigated at fieldstrengths close to 22 kG. Only ΔJ= 1 rotational transitions with ΔM = ± 1 selection rules did show appreciable splittings due to the magnetic field. From the splittings the diagonal elements of the molecular gr-tensor were determined to be: gaa = ∓ 0.020(3) ; gbb = ∓ 0.0165(8) ; gcc= + 0.0126(5). (Only the relative signs of the g-values are obtained from the experiment). The susceptibility anisotropics were found to be close to zero.

The Methyl Alcohol Molecule and Its Microwave Spectrum

1953 ◽  
Vol 21 (10) ◽  
pp. 1804-1816 ◽  
Author(s):  
Eugene V. Ivash ◽  
David M. Dennison
Keyword(s):  
Methyl Alcohol ◽  
Microwave Spectrum ◽  
Alcohol Molecule

Microwave Spectrum of Methane-d2, CH2D2

1975 ◽  
Vol 53 (19) ◽  
pp. 2023-2028 ◽  
Author(s):  
Eizi Hirota ◽  
Misako Imachi
Keyword(s):  
Dipole Moment ◽  
Microwave Spectrum ◽  
Normal Coordinate Analysis ◽  
Centrifugal Distortion ◽  
Normal Coordinate ◽  
Rotational Constants ◽  
Microwave Spectrometer ◽  
Rotational Transitions ◽  
Centrifugal Distortion Constants

Three rotational transitions of methane-d2 were observed by a source-modulation microwave spectrometer. The two differences in the rotational constants, A – C and B – C, were determined to be 37 555.758 and 13 664.280 MHz, respectively, from the observed frequencies of 110 ← 101 and 211 ← 202 after correcting for the centrifugal distortion effects. The centrifugal distortion constants were evaluated by a normal coordinate analysis. The dipole moment of CH2D2 was determined to be 0.014 ± 0.005 D, by comparing the intensity of 211 ← 202 with that of an oxygen line.

Microwave spectrum of trans-1-methoxy-1,3-butadiene

1977 ◽  
Vol 55 (19) ◽  
pp. 3480-3486 ◽  
Author(s):  
R. Kewley ◽  
S. C. Dass
Keyword(s):  
Vibrational State ◽  
Microwave Spectrum ◽  
The Other ◽  
Centrifugal Distortion ◽  
Rotational Constants ◽  
Ground Vibrational State ◽  
Microwave Spectra ◽  
Trans Conformer ◽  
Distortion Parameters

The microwave spectra of two conformers of 1-methoxy-1,3-butadiene have been studied in the 18 to 40 GHz region. One conformer is the s-trans conformer of trans-1-methoxy-1,3-butadiene. The other is most likely the corresponding s-cis conformer. The rotational constants for the ground vibrational state are (in MHz) s-trans: A = 24 524(16); B = 1336.51(1); C = 1277.76(1); s-cis: A = 12 642.73(23); B = 1607.61(1); and C = 1439.64(1). The centrifugal distortion parameters DJK and DJ have also been determined for each conformer.For the s-trans conformer two series of torsional satellites have been found which are assigned as O—CH torsion with frequency 60(20) cm−1 and =C—C= torsion, frequency 80(30) cm−1. For the s-cis conformer one series of satellites has been observed, which has been assigned to =C—C= torsion, of frequency 103(30) cm−1.

The Microwave Spectrum of trans-2,3-Dimethyloxirane in Torsional Excited States

1996 ◽  
Vol 51 (8) ◽  
pp. 923-932 ◽  
Author(s):  
H. Hartwig ◽  
H. Dreizler
Keyword(s):  
Internal Rotation ◽  
Potential Function ◽  
Excited States ◽  
Ground State ◽  
Microwave Spectrum ◽  
Rotation Axes ◽  
Direction Cosines ◽  
Rotational Transitions ◽  
Good Agreement

Abstract The microwave spectrum of trans-2,3-dimethyloxirane (CH3CHOCHCH3) in the excited tor-sional states υ17 = 1 and υ33 = 1 has been measured in the range from 8 to 26 GHz and assigned. An analysis of internal rotation splittings of the observed rotational transitions was performed using the internal axis method (or "combined axis method") with a newly developed program accounting for the top-top coupling. The threefold hindering potential V3 and the direction cosines λ g,i of the internal rotation axes i with respect to the principal inertia axes g are in a good agreement with the ground state values. Additionally, the sixfold hindering parameter V6 was found to be - 0.2600(12) kJ/mol. The value of the parameter V′12 describing the top-top coupling in the potential function (via V′12 sin 3 τ1 sin 3 τ2), was determined to -0.4240(6) kJ/mol.

Notizen: A Contribution to the Microwave Spectrum of Dimethylether-D6 in Excited Torsional States

1975 ◽  
Vol 30 (12) ◽  
pp. 1782 ◽  
Author(s):  
H. Lutz ◽  
H. Dreizler
Keyword(s):  
Internal Rotation ◽  
Microwave Spectrum ◽  
Potential Parameter ◽  
Rotational Transitions

Abstract A number of rotational transitions of (CD3)2O in the excited torsional states ν̃=l1 and ν̃=l2 were recorded in the region from 8.0 to 40.0 GHz. The potential parameter V3 and the angle α between the axis of internal rotation and the b-axis were fitted to line splittings. The results are V3 = 2545 cal/mole and α = 60.8°.

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