# SOME RECENT INVESTIGATIONS IN THE INFRARED SPECTRUM

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/14269

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 Title: SOME RECENT INVESTIGATIONS IN THE INFRARED SPECTRUM Creators: Lecomte, J. Issue Date: 1951 Abstract: The spectra of metallic meta-borates, the general formula of which is $BO_{2}Me$ (Me = monovalent metal), taken by the powder method reveal the presence of other groups, probably $B_{4}O_{7}$ and $BO_{3}$ (Mrs. Cl. Duval and J. Lecomte). It has been possible by the same method to follow the modifications of structure as the sample is heated (Mrs. Dupuy). The spectra of minerals (chiefly carbonates) currently are being studied with polarized radiation together with the spectra of crystalline powders and powders prepared synthetically having the same chemical composition, in an effort to identify the observed bands (Mlle. Louisfert). Mrs. Vincent is, at present, carrying out theoretical and experimental studies on the intensities of the absorption bands of gases (HCl and CO) and plans to measure the variation of the intensities for successive harmonics at different temperatures. The fine structure, between 1.5 and $1.9 \mu$ approximately, of the vibration-rotation spectra of the halogen derivatives of methane and sulphuric anhydride $(H_{2}S)$ was obtained by Mrs. R. Mathis. She has already published a satisfactory interpretation for the band in water vapor at 2.6 and $1.87 \mu$ which she has resolved very well, and is currently attempting to explain the very numerous lines obtained for the other compounds. M. G. Gauthier again has set about to study the harmonic bands and combination bands in the near infrared with different aliphatic hydrocarbon and liquid benzene by means of a grating spectrograph. His interpretations are now applied to the study of chemical reactions in the liquid state. Finally, M. Larnaudie has calculated the position of the 32 fundamental vibrations of cyclohexane, and the agreement with experiment proves very satisfactory. (Determination of force and interaction constants). This study is now being extended to other derivatives of cyclohexane. URI: http://hdl.handle.net/1811/14269 Other Identifiers: 1951-L-7