The study of Raman spectra of chloroform CH vibrations in liquids

Tukhvatullin, F. H.; Atakhodjaev, A.K.; Djumabaev, A.; Tashkenbaev, U. N.; Kleiner, Israel; Osmanov, S. A.

doi:10.1016/0167-7322(92)80061-l

Cited by 1 publication

(6 citation statements)

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“…Considering the data for a chloroform-nitrobenzene solution [19][20], the concentration change in the band at 3022 cm −1 in a CHBr 3 -nitromethane solution can be explained by complexity of the band, the presence of a doublet structure, components of which corresponds to the monomers (low-frequency component) and associated molecules of bromoform (highfrequency component). Due to the increase of the high-frequency component intensity with the dilution of bromoform, the total band is shifted toward higher frequencies.…”

Section: Resultsmentioning

confidence: 99%

“…In fact, the position of the line of C-H vibrations of methane in the gas phase is generally higher than in the liquid state. Therefore, although there is a high frequency shift of C-H vibrations (for example, a solution of chloroformnitrobenzene [19]), however, the frequency of vibrations is less than for the gas. Somewhat unexpected is the fact that the frequency of C-H vibrations in associates is higher than the frequency of vibrations of the monomers.…”

Section: Resultsmentioning

confidence: 99%

“…Somewhat unexpected is the fact that the frequency of C-H vibrations in associates is higher than the frequency of vibrations of the monomers. According to [6], the high-frequency shift of C-H vibrations of chloroform was also observed in solvents such as acetone and water; and, for bromoform, in cyclohexane and CCl 4 [20]. Here are details on the half-widths of C-H vibrations of monomers and associated molecules.…”

Section: Resultsmentioning

confidence: 99%

“…Meanwhile, even for chloroform, not all spectroscopic data on the ability to form intermolecular hydrogen bonds are understood [1][2][3][4][5][6][7][8][9][10]. There is the evidence that the intermolecular hydrogen bonds exist in pure chloroform [6]. Due to the smaller proton-donor ability, the intermolecular interactions of bromoform CHBr 3 with a proton acceptor should be seen in the spectra less clearly than in the case of chloroform.…”

Section: Introductionmentioning

confidence: 99%

“…The distribution of the electron cloud in the bond is such that hydrogen can participate in the formation of an intermolecular hydrogen bond. In the literature [1][2][3][4][5][6][7][8][9], there is no clarity on this issue.…”

Section: Introductionmentioning

confidence: 99%

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Raman Scattering Spectra of Liquid Bromoform and Its Solutions

Tukhvatullin¹,

Tashkenbaev²,

Jumabaev³

et al. 2015

Ukr. J. Phys.

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In the Raman spectra, the vibration bands of bromoform in solutions of proton-donor solvents at 537 and 3020 cm −1 undergo significant changes, which are associated with the aggregation of molecules of bromoform with solvent molecules (pyridine, nitrobenzene, nitromethane). There is a high frequency shift of the band of C-H vibrations of bromoform in such solvents. However, even at the maximum frequency shift, the frequency of C-H vibrations is less than the frequency of the vibration in the gas phase. In a neutral solvent (heptane), the width of the band of C-H vibrations decreases with a small high-frequency shift (∼2 cm −1). Changes of the parameters of C-Br vibrations in the Raman spectra show that these vibrations are subjected to the indirect influence of the formation of hydrogen bonds between СHBr3 molecules and the molecules of proton-donor solvents. K e y w o r d s: hydrogen bond, molecule, vibration, frequency, Raman spectra, hydrogen bond length, intermolecular hydrogen bond.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%