Mean Square Amplitudes and Force Constants of Tetrahedral Molecules. I. Carbon Tetrachloride and Germanium Tetrachloride

1960 ◽  
Vol 32 (3) ◽  
pp. 643-652 ◽  
Author(s):  
Yonezo Morino ◽  
Yasushi Nakamura ◽  
Takao Iijima
Keyword(s):  
Carbon Tetrachloride ◽  
Force Constants ◽  
Mean Square ◽  
Germanium Tetrachloride ◽  
Tetrahedral Molecules

Force Constants of Tetrahedral Molecules

1958 ◽  
Vol 28 (3) ◽  
pp. 514-515 ◽  
Author(s):  
C. W. F. T. Pistorius
Keyword(s):  
Force Constants ◽  
Tetrahedral Molecules

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.

Tetraquecksilbermethane, II [1]Tetrakis(halogenoquecksilber)-methane C(HgX)4 (X = F, Cl, Br und I): Synthesen und Schwingungsspektren / Tetramercurimethanes, II [1]Tetrakis(halomercuri)methanes C(HgX)4 (X = F, Cl, Br und I): Syntheses and Vibrational Spectra

1979 ◽  
Vol 34 (3) ◽  
pp. 390-395 ◽  
Author(s):  
Dietrich Breitinger ◽  
Wilfred Morell ◽  
Knut Grabetz
Keyword(s):  
Vibrational Spectra ◽  
Hydrofluoric Acid ◽  
Force Constants ◽  
The Other ◽  
Other Hand ◽  
Highly Sensitive ◽  
Symmetry Species ◽  
Complete Series ◽  
Tetrahedral Molecules

Abstract The complete series of tetrakis(halomercuri)methanes C(HgX)4 (X = F, Cl, Br and I) was prepared by metathesis of tetrakis(acetoxymercuri)methane and aqueous hydrofluoric acid and solutions of halides (Cl-, Br-, and I-), respectively. All compounds are insoluble in most common solvents, but partly soluble in dimethylsulfoxide. Complete vibrational spectra indicate more or less ideally tetrahedral molecules C(HgX)4 in all cases. The originally triply degenerate valence vibrations of the CHg4 entities and the force constants for the C-Hg bonds show distinct correlations with the electronegativities of the halides X. On the other hand the totally symmetrical valence vibrations of CHg4 were found to be highly sensitive to variations in X, mainly due to coupling with the valence vibrations of the Hg-X-groups of the same symmetry species. Some analogies in the vibrational behaviour of the CHg4 fragments and of the isosteric NHg4 core in tetramercurioammonium complexes were observed and discussed.

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