Infrared Spectra of the Halothane–Trimethylamine Complex in Liquefied Krypton

The IR absorption spectra of solutions of mixtures of halothane (C 2 HBrClF 3 ) and trimethylamine ((CD 3 ) 3 N) in liquefied krypton were obtained and analyzed. Bands assigned to weak hydrogen-bonded complexes have been identified. In a series of temperature experiments on the change in the integra...

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Bibliographic Details
Published inOptics and spectroscopy Vol. 129; no. 5; pp. 517 - 524
Main Authors Melikova, S. M., Rutkowski, K. S.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.05.2021
Springer Nature B.V
Subjects
Absorption spectra
Anharmonicity
Bonding strength
Enthalpy
Hydrogen bonding
Infrared spectra
Krypton
Lasers
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Resonance
Trimethylamine
IR spectra of cryosolutions
ab initio calculations
halothane
liquid Kr
hydrogen bond
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Summary:The IR absorption spectra of solutions of mixtures of halothane (C 2 HBrClF 3 ) and trimethylamine ((CD 3 ) 3 N) in liquefied krypton were obtained and analyzed. Bands assigned to weak hydrogen-bonded complexes have been identified. In a series of temperature experiments on the change in the integral intensities of the bands of monomers and complexes, the enthalpy of formation of complexes was estimated. An extremely strong increase in the intensity of the second-order bands attributed to the first overtone of bending CH vibrations of halothane was found. The effect is determined by strong anharmonic interactions of a resonant nature (Fermi resonance and Darling–Dennison resonance). The results of ab initio calculations reproduce the experimentally observed effects.
ISSN:0030-400X
1562-6911
DOI:10.1134/S0030400X21040159