Understanding Fermi resonances in the complex vibrational spectra of the methyl groups in methylamines

2021 ◽  
Vol 23 (6) ◽  
pp. 3739-3747
Author(s):  
Qian-Rui Huang ◽  
Tomoya Endo ◽  
Saurabh Mishra ◽  
Bingbing Zhang ◽  
Li-Wei Chen ◽  
...  
Keyword(s):  
Vibrational Spectra ◽  
Fermi Resonance ◽  
Methyl Groups ◽  
Spectral Features ◽  
Fermi Resonances

Vibrational spectra of the methyl groups in mono-methylamine (MMA), dimethylamine (DMA), and trimethylamine (TMA) monomers and their clusters were measured to capture their spectral features as a result of bend/umbrella-stretch Fermi resonance (FR).

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

Vibrational Spectra of Bis-(Monothioacetylacetonato) Ni(II)

1969 ◽  
Vol 23 (3) ◽  
pp. 224-229 ◽  
Author(s):  
Umesh Agarwala ◽  
P. Bhaskara Rao
Keyword(s):  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Normal Coordinate Analysis ◽  
The Other ◽  
Methyl Groups ◽  
Vibrational Modes ◽  
Normal Coordinate ◽  
Conjugated Systems

The infrared spectra of substituted acetylacetonates have been discussed in the light of normal coordinate analysis of bis-(monothioacetylacetonato) Ni(II) assuming methyl groups as point masses. The Urey-Bradley potential constants evaluated are found to be quite close to those of analogous systems studied earlier. The calculations show that each of the fundamental bands results from vibrational modes involving appreciable contributions from a number of bonds. The single major contribution from the stretching of C = S has been found in the 723 cm−1 band. This is in agreement with the other conjugated systems, like thioamides, studied earlier.

Hydrogen bond induced enhancement of Fermi resonances in N–H⋯N hydrogen bonded complexes of anilines

2018 ◽  
Vol 20 (33) ◽  
pp. 21557-21566 ◽  
Author(s):  
Saurabh Mishra ◽  
Jer-Lai Kuo ◽  
G. Naresh Patwari
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Fermi Resonance ◽  
Alkyl Amines ◽  
Fermi Resonances ◽  
Bonded Complexes ◽  
Hydrogen Bonded

Enhancement of Fermi resonance intensities due to the formation of N–H⋯N hydrogen bonding of anilines with alkyl amines is analyzed using a two-state deperturbation model.

Vibrational Spectroscopic Study of 0,0-Dimethyl 0-(2,4,5-Trichlorophenyl)Phosphorothioate

1971 ◽  
Vol 25 (4) ◽  
pp. 449-456 ◽  
Author(s):  
R. A. Nyquist ◽  
W. W. Muelder
Keyword(s):  
Spectroscopic Study ◽  
Vibrational Spectra ◽  
Spectral Features ◽  
Vibrational Assignments

Pertinent spectral features of 0,0-dimethyl 0-(2,4,5-trichlorophenyl)phosphorothioate have been assigned on the basis of comparison with the vibrational spectra of the 0,0-dimethyl- d6 analog, the P = O analog, the 0,0-dimethyl- d6 P = O analog, and by comparison with vibrational assignments for 0,0-dimethyl phosphorochloridothioate, 0,0-dimethyl- d6 phosphorochloridothioate, and 1-fluoro-2,4,5-trichlorobenzene.

The Vibrational Spectra of Methyl Groups in Methylthiolate and Methoxy Adsorbed on Cu(100)

Langmuir ◽  
2002 ◽  
Vol 18 (10) ◽  
pp. 3759-3762
Author(s):  
M. P. Andersson ◽  
P. Uvdal
Keyword(s):  
Vibrational Spectra ◽  
Methyl Groups

Manifestation of Fermi resonance in the vibrational spectra of 5-ioduracil, and its deutero-derivatives isolated in low-temperature Ar matrices

2014 ◽  
Vol 40 (12) ◽  
pp. 1097-1103 ◽  
Author(s):  
A. Yu. Ivanov ◽  
Yu. V. Rubin ◽  
S. A. Egupov ◽  
L. F. Belous ◽  
V. A. Karachevtsev
Keyword(s):  
Low Temperature ◽  
Vibrational Spectra ◽  
Fermi Resonance

Infrared and Raman Spectra of Bis(Melaminium) Sulfate Dihydrate

2003 ◽  
Vol 2003 (8) ◽  
pp. 518-521 ◽  
Author(s):  
M.K. Marchewka
Keyword(s):  
Raman Spectra ◽  
Vibrational Spectra ◽  
Crystalline State ◽  
Room Temperature ◽  
Spectral Features ◽  
Infrared And Raman Spectra ◽  
X Ray ◽  
Internal Vibrations

Room temperature powder infrared and Raman measurements for the new melaminium salt, bis(2,4,6-triamino-1,3,5-triazin-1-ium) sulfate dihydrate, 2C3H7N6+·SO42-·2H2O, in the crystalline state, were carried out. The vibrational spectra in the region of internal vibrations of the ions corroborate recent X-ray data of Janczak et al. Some spectral features of this new crystal are referred to those of other crystalline melaminium salts.

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