Vibrational Spectra of Bis-(Monothioacetylacetonato) Ni(II)

1969 ◽  
Vol 23 (3) ◽  
pp. 224-229 ◽  
Author(s):  
Umesh Agarwala ◽  
P. Bhaskara Rao
Keyword(s):  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Normal Coordinate Analysis ◽  
The Other ◽  
Methyl Groups ◽  
Vibrational Modes ◽  
Normal Coordinate ◽  
Conjugated Systems

The infrared spectra of substituted acetylacetonates have been discussed in the light of normal coordinate analysis of bis-(monothioacetylacetonato) Ni(II) assuming methyl groups as point masses. The Urey-Bradley potential constants evaluated are found to be quite close to those of analogous systems studied earlier. The calculations show that each of the fundamental bands results from vibrational modes involving appreciable contributions from a number of bonds. The single major contribution from the stretching of C = S has been found in the 723 cm−1 band. This is in agreement with the other conjugated systems, like thioamides, studied earlier.

Vibrational Spectra and Normal Coordinate Analysis of Disulfuryl Difluoride S2O5F2 and Diselenonyl Difluoride Se2O5F2

1993 ◽  
Vol 58 (3) ◽  
pp. 517-529 ◽  
Author(s):  
Jiří Toužín ◽  
Miloš Černík
Keyword(s):  
Raman Spectrum ◽  
Force Field ◽  
Raman Spectra ◽  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Room Temperature ◽  
Normal Coordinate Analysis ◽  
Normal Coordinate ◽  
Valence Force Field ◽  
Overlapping Bands

Raman spectra (1 600 - 100 cm-1) of liquid S2O5F2 and Se2O5F2 and infrared spectra of liquid and gaseous S2O5F2 were measured. A modified general valence force field was used for their interpretation by normal coordinate analysis. Refinement of the number of lines in the Raman spectrum of S2O5F2 by means of numerical separation of the overlapping bands led to the conclusion that liquid S2O5F2 consists at least of three rotamers at room temperature.

Die Schwingungsspektren von Cs250Cr2O7 und Cs253Cr2O7 / Vibrational Spectra of Cs250Cr2O7 and Cs253Cr2O7

1974 ◽  
Vol 29 (1-2) ◽  
pp. 58-60 ◽  
Author(s):  
Rainer Mattes ◽  
Frank Königer ◽  
Achim Müller
Keyword(s):  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Deformation Mode ◽  
Normal Coordinate Analysis ◽  
Normal Coordinate

The infrared spectra of the compounds Cs250Cr2O7 and Cs253Cr2O7 have been measured. An approximate normal coordinate analysis has been performed on the basis of these frequencies. The result confirms the assignment of the band at 70-90 cm -1 to the CrOCr deformation mode.

The Vibrational Spectra and Normal Coordinate Analysis of 3,3,3-Trifluoropropene and Hexafluoropropene

1979 ◽  
Vol 34 (11) ◽  
pp. 1320-1329 ◽  
Author(s):  
D. Christen ◽  
V. Hoffmann ◽  
P. Klaeboe
Keyword(s):  
Raman Spectra ◽  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Vapour Phase ◽  
Normal Coordinate Analysis ◽  
Polarization Data ◽  
Normal Coordinate ◽  
Torsional Mode ◽  
Vibrational Assignments ◽  
Polarization Measurements

The infrared spectra of 3,3,3-trifluoropropene and hexafluoropropene were studied in the vapour phase and in solution between 4000 and 40 cm-1 . Raman spectra of the compounds as vapours and liquids were recorded and polarization data obtained.The spectra of both molecules are interpreted in terms of Cs symmetry. Complete vibrational assignments, including the torsional mode, are presented, based upon infrared and Raman vapour contours, Raman polarization measurements and the results of a normal coordinate analysis

Vibrational spectra and normal coordinate analysis of crystallinelithium metasilicate

1977 ◽  
Vol 55 (13) ◽  
pp. 2559-2563 ◽  
Author(s):  
V. Devarajan ◽  
H. F. Shurvell
Keyword(s):  
Vibrational Spectra ◽  
Unit Cell ◽  
Normal Coordinate Analysis ◽  
Cell Group ◽  
Vibrational Modes ◽  
Infrared And Raman Spectra ◽  
Vibrational Assignment ◽  
Normal Coordinate ◽  
Lithium Metasilicate ◽  
Symmetry Species

Infrared and Raman spectra of polycrystalline lithium metasilicate have been recorded. A vibrational assignment in terms of the various symmetry species of the unit cell group, C2v, has been made. A normal coordinate analysis of the unit cell vibrations at the centre of the Brillouin zone (k = 0) was carried out to support the assignment and provide descriptions of the vibrational modes. The results are discussed in the light of previous normal coordinate calculations on the isolated metasilicate chain.

Vibrational spectra of aquadioxotetra; peroxodivanadates(V) M2[V2O2(O2)4(H2O)]·xH2O (M = N(CH3)4, Cs)

1990 ◽  
Vol 55 (6) ◽  
pp. 1485-1490 ◽  
Author(s):  
Peter Schwendt ◽  
Milan Sýkora
Keyword(s):  
Raman Spectra ◽  
Vibrational Spectra ◽  
Normal Coordinate Analysis ◽  
Force Constants ◽  
Infrared And Raman Spectra ◽  
Empirical Correlations ◽  
Normal Coordinate ◽  
Bond Lengths ◽  
Stretching Vibrations

The infrared and Raman spectra of M2[V2O2(O2)4(H2O)]·xH2O and M2[V2O2(O2)4(D2O)]·xD2O (M = N(CH3)4, Cs) were measured. In the region of the vanadium-oxygen stretching vibrations, the spectra were interpreted based on normal coordinate analysis, employing empirical correlations between the bond lengths and force constants.

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