The vibrational spectra of Methane Sulphonyl Chloride and Methane Sulphonyl Fluoride

1953 ◽  
Vol 6 (1) ◽  
pp. 33 ◽  
Author(s):  
NS Ham ◽  
AN Hambly
Keyword(s):  
Vibrational Spectra ◽  
Vibrational Frequencies ◽  
Improved Method ◽  
Infra Red ◽  
Sulphonyl Fluoride

The Raman and infra-red spectra of methane sulphonyl chloride and methane sulphonyl fluoride have been measured. Assignments of the vibrational frequencies of the two molecules have been made ; the frequency 377 cm.-1 is characteristic of the S-Cl linkage and 1210 cm.-1 of the S-F linkage in these compounds. An improved method for the preparation of methane sulphonyl fluoride is described.

Vibrational Spectra of Sulphonyl Derivatives. V. A Reassignment of the SO2 Stretching Frequencies in Sulphonyl Fluorides

1960 ◽  
Vol 13 (4) ◽  
pp. 443 ◽  
Author(s):  
NS Ham ◽  
AN Hambly ◽  
RH Laby
Keyword(s):  
Vibrational Spectra ◽  
Vibrational Assignments ◽  
Infra Red ◽  
Methyl Benzene ◽  
Sulphonyl Fluoride

The symmetric SO2 stretching frequency in methane sulphonyl fluoride and a number of aromatic sulphonyl fluorides is reassigned to a frequency of 1210 cm-1 on the basis of new infra-red evidence (vapour and solution spectra of CH3SO2F and the infra-red spectra of a number of aromatic sulphonyl chlorides and the corresponding fluorides). Complete vibrational assignments for benzene sulphonyl chloride, benzene sulphonyl fluoride, and methyl benzene sulphonate are also given. The S-F stretching frequency appears as a strong infra-red band near 780 cm-1 and the aromatic sulphonyl frequency near 1090 cm-1 is identified as being more specifically characteristic of the Car-S bond.

Infra-red spectra and the solid state. IV. Borofluorides

1951 ◽  
Vol 210 (1101) ◽  
pp. 217-223 ◽  
Keyword(s):  
Solid State ◽  
Crystal Field ◽  
Vibrational Spectra ◽  
Vibrational Frequencies ◽  
Isotopic Species ◽  
Lower Symmetry ◽  
Infra Red

The vibrational spectra of the solid crystalline borofluorides of ammonium, potassium and sodium have been measured between 2 and 25μ, both at room temperatures and at that of liquid air. The bands observed have been assigned to vibrational frequencies of the (BF 4 ) - and (NH 4 ) + ions. Some of the bands are found to split into two or more components, and this splitting has been considered in terms of isotopic species and in relation to the removal of vibrational degeneracy which may arise when the tetrahedral ions are situated in a crystal field of lower symmetry.

Studies of the Jahn - Teller effect IV. The vibrational spectra of spin-degenerate molecules

1962 ◽  
Vol 255 (1050) ◽  
pp. 31-53 ◽  
Keyword(s):  
Raman Spectrum ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Physical Theory ◽  
Vibronic Coupling ◽  
Infra Red ◽  
Jahn Teller ◽  
Jahn Teller Effect ◽  
Active Vibration ◽  
Degenerate States

The physical theory necessary for interpreting the vibrational spectra of spin-degenerate molecules is developed in this paper. Particular attention is paid to those molecules whose behaviour is expected to be markedly different from that of both orbitally non-degenerate molecules and those with purely spatial degeneracy. These include certain Kramers degenerate molecules, whose Raman spectra are expected to contain reverse-polarized contributions, and also tetrahedral and octahedral molecules in fourfold degenerate states. The case of a fourfold degenerate octahedral molecule is investigated in the limits of strong vibronic coupling by one of the Jahn—Teller active vibrations (e g and t 2g ). It turns out that the forbidden t 2u vibration may be infra-red active, that the Raman spectrum may contain reverse-polarized contributions and that both infra-red and Raman spectra may contain strong progressions of bands involving multiple excitations of the vibronically active vibration.

Vibrational spectra of model compounds of polypropylene—I. Infra-red spectra and rotational isomerism in (n = 2, 3, 4)

1967 ◽  
Vol 23 (8) ◽  
pp. 2371-2381 ◽  
Author(s):  
E. Benedetti ◽  
S. Pucci ◽  
P. Pino ◽  
V. Schettino ◽  
S. Califano
Keyword(s):  
Vibrational Spectra ◽  
Rotational Isomerism ◽  
Model Compounds ◽  
Infra Red

scholarly journals Infra-red spectra and state of aggregation. II

1948 ◽  
Vol 195 (1040) ◽  
pp. 1-12 ◽  
Keyword(s):  
Internal Structure ◽  
Absorption Spectra ◽  
Aromatic Hydrocarbons ◽  
Vibrational Spectra ◽  
Infra Red ◽  
Liquid States ◽  
Solid And Liquid States

In continuation of earlier work on the correlation of infra-red absorption spectra of matter in different states of aggregation, the vibrational spectra of a number of substances have been measured in the solid and liquid states. These included paraffins, aromatic hydrocarbons and their simple derivations. The alterations in spectrum which occur on melting are complex, and few generalizations can be made. Attempts have been made to consider them in terms of the assignment of vibration bands to certain atomic groupings, but it seems probable that before the results can be satisfactorily understood it will be necessary to know more about the internal structure of the solid substances.

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