Showing papers on "Infrared spectroscopy correlation table published in 1971"
01 Jan 1971
TL;DR: In this article, the experimental, theoretical, and empirical correlations between functional organic groups and the infrared spectrum were discussed and many examples of spectra of inorganic compounds in the solid phase were presented.
Abstract: This chapter discusses the experimental, theoretical, and empirical correlations between functional organic groups and the infrared spectrum. The application of infrared spectroscopy to the identification of inorganic compounds is less successful. In obtaining infrared spectra of inorganic solids, an experimental complication arises from possible chemical reaction between the inorganic compound and the infrared window material or support medium. The chapter presents many examples of spectra of inorganic compounds in the solid phase. The majority of these compounds are crystalline solids in which the crystallographic unit cell contains several polyatomic ions or molecules. Optical modes called lattice modes of vibration result from the motion of one polyatomic group relative to another within the unit cell. Lattice modes occur in the region 400–10 cm −1 and are characteristic of specific crystal geometry. They are used as fingerprints for an inorganic compound in much the same way as the internal modes of vibration of organic compounds are used in the region 4000–400 cm −1 .
1,578 citations
531 citations
165 citations
TL;DR: A review of spectroscopic studies in the glassy state concludes in this part with the consideration of wavelengths in the infrared region and below, of all the spectral regions, the infrared is the most extensively studied, as can be readily seen from a statistical appraisal of interest as mentioned in this paper.
Abstract: The current review of spectroscopic studies in the glassy state concludes in this part with the consideration of wavelengths in the infrared region and below, Of all the spectral regions, the infrared is the most extensively studied, as can be readily seen from a statistical appraisal of interest, a s judged from the number of publications in the various spectral regions, given in Fig 7 in the final section of this paper
45 citations
TL;DR: In this article, the infrared spectra of oxy- and hydroxy-rhenium compounds of general formulae ReOnL6-xx, ReO(OH)L4y, Re(OH 2L4x) and binuclear compounds with the oxygen bridge ReORe have been examined.
29 citations
TL;DR: In this article, the B2 and A2 torsional frequencies have been assigned at 268 and 244, 245, and 208, 207 and 182, 247 and 210, 207, and 175, respectively.
Abstract: The far infrared spectra of solid CH3OCH3, CD3OCH3, CD3OCD3, CH3SCH3, CH3SeCH3, CH3TeCH3 have been recorded between 350 and 33 cm−1. The B2 and A2 torsional frequencies have been assigned at 268 and 244, 245, and 208, 207 and 182, 247 and 210, 207 and 175, and 185 cm−1 for the above molecules at liquid nitrogen temperatures. The barriers calculated from these assignments are 3.50, 3.48, 3.39, 3.22, 2.40, and 2.27 kcal/mole, respectively. The lattice bands observed in the infrared spectra of the isotopic dimethyl ethers have been assigned to librational and translational motion on the basis of the deuteration shifts. The infrared spectra of the sulfide and selenide in the region of the lattice frequencies are similar and a tentative assignment of these bands to librational and translational motions is presented based on the expected shift factors. The infrared lattice spectrum of dimethyl telluride is also presented.
21 citations
TL;DR: The matrix isolation infrared spectroscopy has proven on numerous occasions to be an extremely powerful tool for determining vibrational frequencies and molecular structures of highly reactive species The need for reliable Raman data on comparable systems is obvious.
Abstract: The technique of matrix isolation infrared spectroscopy has proven on numerous occasions to be an extremely powerful tool for determining vibrational frequencies and molecular structures of highly reactive species The need for reliable Raman data on comparable systems is obvious
21 citations
TL;DR: In this article, a large number of examples are given of the use of infrared spectroscopic data to elucidate the detailed structure of nitro-compounds and their salts, and also to study the behaviour of these compounds in various media.
Abstract: Data on the infrared spectra of aliphatic nitro-compounds and their salts are discussed and summarised. Relations are established between the position of the nitro-stretching bands in the absorption spectrum and the structure of the radical. A fairly large number of examples are given of the use of infrared spectroscopic data to elucidate the detailed structure of nitro-compounds and their salts, and also to study the behaviour of these compounds in various media. Problems of the assignment of the vibrations in nitro-compounds and in the salts of mononitro- and polynitro-compounds are examined. Possible uses of the infrared relations to identify and analyse nitro-compounds and their derivatives are illustrated. The bibliography contains 237 references.
21 citations
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16 citations
TL;DR: In this paper, normal vibration analysis of the in-plane vibrations of methyl N-methylthiocarbamate, CH 3 NH(CS)OCH 3, has been carried out employing the Urey-Bradley-Shimanouchi force field; the band assignments and force constants have been compared with those of related molecules.
TL;DR: In this article, a catalog of laser-stimulated infrared emission spectra from 36 compounds is presented, and the spectra are correlated with the appropriate bond vibrations, and other features are discussed.
TL;DR: In this paper, the infrared spectra of some of the isotopic varieties of the hydrogen cyanide molecule have been measured employing high precision vacuum grating spectrographs and molecular constants were derived from these data.
TL;DR: In this paper, a long path length cell was used to measure the laser-induced infrared emission of a number of organic compounds, and the use of this process as an aid to infrared absorption spectroscopy was described.
TL;DR: The Raman spectra of heptasulphurimide and hexaspalphur diimides are compared with infrared spectra in the solid state and in solution.
TL;DR: In this paper, it was shown that a vibration involving two equivalent chlorine atoms should exhibit an infrared spectrum of three lines with absorbances in the ratio of approximately 9.4:6.
TL;DR: In this paper, the infrared and Raman spectra of both the high and low-temperature modifications of NaBD 4 are reported in order to facilitate the assignment of bands due to isotopic splitting.
TL;DR: In this paper, a three-membered ring molecule with double bonds internal and external to the ring was studied and the infrared vapor, solution and solid phase spectra were obtained and eight of the infrared active fundamentals were assigned.
TL;DR: The activity of heparin is now determined by a biological method, which consists of the establishment of the ability of theHeparin sample to be analyzed to prevent clotting of citrate plasma of sheep blood in comparison with the activity of a standard preparation.
Abstract: The activity of heparin is now determined by a biological method. Its essence consists of the establishment of the ability of the heparin sample to be analyzed to prevent clotting of citrate plasma of sheep blood in comparison with the activity of a standard preparation. The determination is conducted with various amounts of heparin, dividing the average value of its activity from several parallel experiments. The results of the determination depend on the animal from whose blood the plasma was obtained and on the experimenter, who performs a visual evaluation of the clotting of the plasma according to a five-point system. This method is long, laborious, and gives Iarge discrepancies in parallel determinations.
TL;DR: In this paper, it is shown that certain bands of a spectrum when measured in solution differ considerably from the same bands obtained in solid state by the usual potassium bromide pellet technique.
Abstract: It is a well-known observation in infrared absorption spectroscopy that certain bands of a spectrum when measured in solution differ considerably from the same bands obtained in solid state by the usual potassium bromide pellet technique2. Since these solid phase spectra are critically affected by the preparation procedures of grinding, mixing, pressure, etc, solution spectra are routinely perferred due to their relatively good reproducibility.