Etude expérimentale et théorique des spectres de vibration des dérivés di- et trisubstitués de l'isothiazole

1977 ◽  
Vol 55 (12) ◽  
pp. 2302-2309 ◽  
Author(s):  
Gilbert Mille ◽  
Michel Guiliano ◽  
Jacques Chouteau
Keyword(s):  
Solid State ◽  
Absorption Spectra ◽  
Raman Spectra ◽  
Infrared Absorption ◽  
Liquid Solution ◽  
Etude Expérimentale ◽  
Normal Vibrations ◽  
Modes Of Vibration ◽  
Infrared Absorption Spectra ◽  
Étude Expérimentale

The infrared absorption spectra in different physical states (liquid, solution, vapor) and the Raman spectra in the liquid or solid state of di- and trisubstituted isothiazole derivatives have been analyzed. For some compounds a study of the normal vibrations has also been done. An assignment of the fundamental modes of vibration of these molecules is given and discussed.

Schwingungsspektren von Derivaten des Pentaerythrits

1966 ◽  
Vol 21 (11) ◽  
pp. 1889-1898 ◽  
Author(s):  
G. Geiseler ◽  
L. Ratz
Keyword(s):  
Force Field ◽  
Absorption Spectra ◽  
Raman Spectra ◽  
Infrared Absorption ◽  
Matrix Method ◽  
Normal Coordinate ◽  
Normal Vibrations ◽  
Valence Force ◽  
Valence Force Field ◽  
Infrared Absorption Spectra

Infrared absorption spectra (4000—400 cm-1) and RAMAN spectra of the pentaerythritol halides have been examined. By comparison with spectra of similar compounds and by a normal coordinate analysis with the aid of the GF-Matrix-Method of WILSON and on the basis of a modified valence force field it was possible to assign a great deal of the normal vibrations. The influence of the halogen atoms on the frequency of characteristic vibrations has been discussed.

The Infrared Absorption Spectra of Some Samarium Diketo-ester Complexes

1970 ◽  
Vol 25 (2) ◽  
pp. 139-141 ◽  
Author(s):  
S. P. Tandon ◽  
P. C. Mehta
Keyword(s):  
Coordination Number ◽  
Absorption Spectra ◽  
Infrared Absorption ◽  
Relative Frequency ◽  
Methyl Acetoacetate ◽  
Frequency Shifts ◽  
Modes Of Vibration ◽  
Infrared Absorption Spectra ◽  
Stretching Vibrations ◽  
First Time

Infrared absorption spectra of some four- and five-coordinated (ethyl 1-methyl acetoacetate) complexes of trivalent samarium have been studied in the region 4000 - 250 cm-1 for the first time. About twenty bands in each chelate have been observed and assigned to different modes of vibration. A study of relative frequency shifts of CO stretching vibrations reveals that the metal-oxygen bonds in all the complexes are nearly of the same strength. The vibrational frequencies, with few exceptions, are found to be nearly independent of the coordination number of the metal.

scholarly journals The Infrared Absorption Spectra of Some Samarium Ethylbenzoyl Acetate Complexes

1970 ◽  
Vol 25 (2) ◽  
pp. 142-145 ◽  
Author(s):  
S. P. Tandon ◽  
P. C. Mehta ◽  
R. N. Kapoor
Keyword(s):  
Metal Complexes ◽  
General Formula ◽  
Absorption Spectra ◽  
Infrared Absorption ◽  
Butoxy Group ◽  
Modes Of Vibration ◽  
Infrared Absorption Spectra ◽  
Stretching Vibrations ◽  
First Time

Infrared absorption spectra of four (ethylbenzoyl acetate) [EBA] complexes of trivalent samarium of the general formula XpSm(EBA)q [X = isopropoxy or t-butoxy group; when p=1, q=2 and vice versa] have been studied in the region 4000-250 cm-1 for the first time. About twenty five bands in each complex have been observed and assigned to different modes of vibration. The separation between asymmetric and symmetric CO stretching vibrations indicates that the bonding in all the complexes is nearly the same. The spectra show that the interaction between the two ligand rings is small in five coordinated metal complexes.

Infrared Absorption Spectra of Some Hydroxy Compounds in the 3 Micron Region

1961 ◽  
Vol 14 (2) ◽  
pp. 211 ◽  
Author(s):  
JS Cook ◽  
IH Reece
Keyword(s):  
Hydrogen Bonding ◽  
Solid State ◽  
Carbon Tetrachloride ◽  
Absorption Spectra ◽  
Infrared Absorption ◽  
Butyl Phenol ◽  
Infrared Absorption Spectra ◽  
Sterically Hindered ◽  
Hydroxy Compounds

Infrared absorption spectra are reported in the region 2.6 to 3.8 microns for the solid state and for solutions in carbon tetrachloride of 10 sterically hindered hydroxy compounds. Absorption types vary from that of 2,4,6-tri-t-butyl phenol, where the OH group is completely " free " in both states, to that of 3,5-diaceto-p-cresol where the bands are diffuse and are centred about 3.4 microns corresponding to very strong hydrogen bonding. Deuteration studies suggest that splitting of the free OH band in several cases may arise from azimuthal orientations of the OH group and for tri-cyclohexyl carbinol -ΔH for this equilibrium has been estimated at 1 kcal/g-mole.

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