ChemInform Abstract: VIBRATIONAL SPECTRA OF LIQUID CRYSTALS PART 9, CALCULATION OF INFRARED AND RAMAN ACTIVE LATTICE VIBRATION FREQUENCIES OF 4,4′-AZOXYDIANISOLE

1975 ◽  
Vol 6 (25) ◽  
Author(s):  
DOLORES GRUNBAUM ◽  
BERNARD J. BULKIN
Keyword(s):  
Liquid Crystals ◽  
Vibrational Spectra ◽  
Lattice Vibration ◽  
Vibration Frequencies

Lattice Vibrations of the Cooperites PdO and PtS

1989 ◽  
Vol 44 (3) ◽  
pp. 169-172 ◽  
Author(s):  
G. Kliche
Keyword(s):  
Force Field ◽  
Vibrational Spectra ◽  
Short Range ◽  
Lattice Vibration ◽  
Covalent Bonding ◽  
Lattice Vibrations ◽  
Vibration Frequencies ◽  
Short Range Force ◽  
Range Force ◽  
Good Agreement

The vibrational spectra of the cooperite type compounds PdO and PtS (space group P42/mmc - D4h9, Z = 2) are analyzed. Good agreement between experimental and calculated lattice vibration frequencies is obtained using a force field which includes short-range force constants only. This demonstrates a highly covalent bonding character of the cooperites.

Atlas of Vibrational Spectra of Liquid Crystals

10.1142/0616 ◽  
1988 ◽  
Author(s):  
P Simova ◽  
N Kirov ◽  
M P Fontana ◽  
H Ratajczak
Keyword(s):  
Liquid Crystals ◽  
Vibrational Spectra

Infrared and Raman Spectroscopic Study of Isocytosine

1974 ◽  
Vol 29 (7-8) ◽  
pp. 343-350 ◽  
Author(s):  
Jean-Maurice Delabar
Keyword(s):  
Infrared Spectroscopy ◽  
Spectroscopic Study ◽  
Raman Spectra ◽  
Lattice Vibration ◽  
Vibration Frequencies ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Frequency Group

Abstract Isocytosine and isocytosine-d3 crystals have been investigated at 300 K, 90 K, and 10 K by infrared spectroscopy; the Raman spectra of crystals and solutions in H2O , D2O have also been studied. Using these data and the frequency group approximation we propose assignments of the fundamental molecular frequencies. Eleven lattice vibration frequencies have been observed in absorption and nine in diffusion.

Elastic constants and lattice vibration frequencies of Mg2Si

1965 ◽  
Vol 26 (1) ◽  
pp. 49-56 ◽  
Author(s):  
W.B. Whitten ◽  
P.L. Chung ◽  
G.C. Danielson
Keyword(s):  
Elastic Constants ◽  
Lattice Vibration ◽  
Vibration Frequencies
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