Universal Parameter for the Extrapolation of Force Constants, Mean‐Square Quantities, and Bond Energies of Halides

1969 ◽  
Vol 50 (9) ◽  
pp. 3670-3673 ◽  
Author(s):  
W. A. Yeranos
Keyword(s):  
Force Constants ◽  
Mean Square ◽  
Bond Energies

Détermination des constantes de force et des amplitudes moyennes de vibration du sous-sulfure de carbone, C3S2

1968 ◽  
Vol 46 (16) ◽  
pp. 2641-2643 ◽  
Author(s):  
Alpha O. Diallo
Keyword(s):  
Vibrational Frequencies ◽  
Force Constants ◽  
Mean Square ◽  
Mean Amplitudes Of Vibration ◽  
Symmetrical Structure ◽  
Symmetry Coordinates ◽  
Shrinkage Effect ◽  
The Mean ◽  
Generalized Mean

The theory of the generalized mean amplitudes of vibration has been applied to the C3S2 molecule, which possesses a linear symmetrical structure. The numerical values of the force constants and the mean square parallel and perpendicular amplitudes at 298°K of all bonded and non-bonded pairs of atoms are calculated from spectroscopic vibrational frequencies by the Cyvin and Morino–Hirota methods, utilizing the symmetry coordinates. The "shrinkage" effect constants are also evaluated by means of the perpendicular mean square amplitudes.

Calculation of the force constants and mean-square amplitudes for the vibrations of PF5, PCl5, and PCl3F2 molecules

1975 ◽  
Vol 22 (6) ◽  
pp. 867-867
Author(s):  
Yu. A. Aleshonkova ◽  
A. D. Plotnikova ◽  
V. I. Sharkov
Keyword(s):  
Force Constants ◽  
Mean Square

Force Constants, Generalised Mean Square Amplitudes and Coriolis Coupling Coefficients of P2I4

1968 ◽  
Vol 23 (10) ◽  
pp. 1300-1302 ◽  
Author(s):  
K. Venkateswarlu ◽  
C. P. Girijavallabhan
Keyword(s):  
Force Field ◽  
Force Constants ◽  
Mean Square ◽  
Coriolis Coupling ◽  
Coupling Coefficients ◽  
Valence Force ◽  
Valence Force Field

Normal co-ordinate analysis has been carried out for diphosphorous tetra iodide (P2I4) on the basis of general valence force field and the force constants have been evaluated. The values of the generalised mean square amplitudes of vibration calculated at 300 °K indicate that the vibrational amplitudes are not large even though the frequencies of vibrations are rather low. The Coriolis coupling coefficients also have been evaluated.

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