Results 261 to 270 of about 3,185,930 (304)

Rotational spectrum, structure and internal rotation in CH3CCl3

Journal of Molecular Spectroscopy, 2008
Abstract The rotational spectra of the v 6  = 1 and v 6  = 2 torsional states of CH 3 C 35 Cl 3 have been measured in the millimeterwave range and accurate spectroscopic constants have been determined. The equilibrium structure, the torsional frequency and the barrier to internal rotation have been calculated ab initio.
L. Margulès, M. Carvajal, J. Demaison
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Internal Rotation in Butane

The Journal of Chemical Physics, 1968
Quantum-mechanical calculations within the Hartree–Fock framework and using two Gaussian basis sets are carried out on several conformations of the butane molecule. The smaller basis set predicts a transgauche barrier of 3.536 kcal/mole, an energy difference of 0.822 kcal/mole between the gauche and trans forms, and a barrier of 6.821 kcal/mole for ...
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Contributions of Internal Rotation to the Rotational Coefficients in Phenol

The Journal of Chemical Physics, 1968
The theory of internal rotation for molecules with twofold barriers is used to calculate the rotational coefficients for phenol using three possible structures. The difference in coefficients for the substates of the ground torsional state is found to be quite dependent upon the structure of the hydroxyl group.
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Rotation-internal rotation spectrum of p-fluorotoluene

Journal of Molecular Spectroscopy, 1989
Abstract The rotational spectrum of p-fluorotoluene in the vibrational ground state is measured over the frequency range 7–63 GHz. For the lowest torsional state (m = 0), 228 transitions up to J = 30 are assigned and fitted to a rigid rotor Hamiltonian to obtain accurate values of the rotational and five quartic centrifugal distortion constants.
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Internal rotation and rotational isomerism in substituted ethanes

Theoretical and Experimental Chemistry, 1967
The types of potential energy curves of internal rotation in substituted ethanes were studied. Formulas for the calculation of the energy differences in rotational isomers and of the potential barriers to internal rotation in these derivatives were obtained by Bernstein's method. As a rule, the calculated results are in agreement with experiment.
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The hyperextended internal rotation view in rotator cuff ultrasonography

Journal of Clinical Ultrasound, 1987
J R, Crass, E V, Craig, S B, Feinberg
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Internal Solar Rotation

1991
The helioseismic determination of the angular velocity distribution within the sun is discussed. In particular, the bulk of the radiative interior of the sun is rotating at more-or-less the same rate as the photosphere. The latitudinal variation of angular velocity appears to change quite abruptly immediately beneath the base of the convection zone ...
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Internal Rotation and Microwave Spectroscopy

Reviews of Modern Physics, 1959
Lin, Chun C., Swalen, Jerome D.
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Internal Rotation in Dichlorobutine

The Journal of Chemical Physics, 1952
Yonezo Morino, Ichiro Miyagawa, Akiyoshi Wada   +2 more
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Internal rotation in diarylalkynes

The Journal of Organic Chemistry, 1971
A. Liberles, B. Matlosz
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