Vibrational Coupling in Solvated H3O+: Interplay between Fermi Resonance and Combination Band

2020 ◽  
Vol 11 (23) ◽  
pp. 10067-10072
Author(s):  
Qian-Rui Huang ◽  
Ying-Cheng Li ◽  
Tomoki Nishigori ◽  
Marusu Katada ◽  
Asuka Fujii ◽  
...  
Keyword(s):  
Fermi Resonance ◽  
Vibrational Coupling ◽  
Combination Band

Infrared spectra and substituent effects in 2-(3-, and 4-substituted phenylmethylene)-1,3-cycloheptanediones

1983 ◽  
Vol 48 (2) ◽  
pp. 586-595 ◽  
Author(s):  
Alexander Perjéssy ◽  
Pavol Hrnčiar ◽  
Ján Šraga
Keyword(s):  
Substituent Effects ◽  
Phenyl Group ◽  
Wave Number ◽  
Vibrational Coupling ◽  
Wave Numbers ◽  
Stretching Vibration ◽  
Stretching Vibrations ◽  
The Relationship ◽  
Derivatives Of ◽  
Effect Of Structure

The wave numbers of the fundamental C=O and C=C stretching vibrations, as well as that of the first overtone of C=O stretching vibration of 2-(3-, and 4-substituted phenylmethylene)-1,3-cycloheptanediones and 1,3-cycloheptanedione were measured in tetrachloromethane and chloroform. The spectral data were correlated with σ+ constants of substituents attached to phenyl group and with wave number shifts of the C=O stretching vibration of substituted acetophenones. The slope of the linear dependence ν vs ν+ of the C=C stretching vibration of the ethylenic group was found to be more than two times higher than that of the analogous correlation of the C=O stretching vibration. Positive values of anharmonicity for asymmetric C=O stretching vibration can be considered as an evidence of the vibrational coupling in a cyclic 1,3-dicarbonyl system similarly, as with derivatives of 1,3-indanedione. The relationship between the wave numbers of the symmetric and asymmetric C=O stretching vibrations indicates that the effect of structure upon both vibrations is symmetric. The vibrational coupling in 1,3-cycloheptanediones and the application of Seth-Paul-Van-Duyse equation is discussed in relation to analogous results obtained for other cyclic 1,3-dicarbonyl compounds.

Anharmonic Coupling Revealed by the Vibrational Spectra of Solvated Protonated Methanol: Fermi Resonance, Combination Bands, and Isotope Effect

2021 ◽  
Vol 125 (9) ◽  
pp. 1910-1918
Author(s):  
Chih-Kai Lin ◽  
Qian-Rui Huang ◽  
Ying-Cheng Li ◽  
Ha-Quyen Nguyen ◽  
Jer-Lai Kuo ◽  
...  
Keyword(s):  
Isotope Effect ◽  
Vibrational Spectra ◽  
Fermi Resonance ◽  
Anharmonic Coupling ◽  
Combination Bands

Pressure tuning of fermi resonance in molecular crystals

1990 ◽  
Vol 3 (1-6) ◽  
pp. 239-241
Author(s):  
H. Däufer ◽  
M. Rubly ◽  
H. J. Jodl ◽  
P. R. Salvi
Keyword(s):  
Molecular Crystals ◽  
Fermi Resonance ◽  
Pressure Tuning

Fermi Resonance Interface Modes: Propagation along the Interfaces

1994 ◽  
Vol 98 (51) ◽  
pp. 13607-13611 ◽  
Author(s):  
V. M. Agranovich ◽  
O. A. Dubovsky ◽  
A. M. Kamchatnov
Keyword(s):  
Fermi Resonance
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