IR Spectra of Hydrogen-Bonded Complexes of Trifluoroacetic Acid with Acetone and Diethyl Ether in the Gas Phase. Interaction between CH and OH Stretching Vibrations

2019 ◽  
Vol 123 (15) ◽  
pp. 3285-3292 ◽  
Author(s):  
Ruslan E. Asfin
Keyword(s):  
Ir Spectra ◽  
Gas Phase ◽  
Diethyl Ether ◽  
Trifluoroacetic Acid ◽  
Phase Interaction ◽  
Stretching Vibrations ◽  
Bonded Complexes ◽  
Hydrogen Bonded

Gas phase observation of the first overtone of the H—F stretching fundamental in hydrogen bonded complexes

1979 ◽  
Vol 57 (11) ◽  
pp. 1341-1349 ◽  
Author(s):  
J. W. Bevan ◽  
B. Martineau ◽  
C. Sandorfy
Keyword(s):  
Gas Phase ◽  
Coupling Constant ◽  
Phase Observation ◽  
Stretching Vibration ◽  
Stretching Vibrations ◽  
Anharmonicity Constants ◽  
Bonded Complexes ◽  
Hydrogen Bonded

First overtones of H—F and D—F stretching vibrations in hydrogen bonded complexes with dimethylether, diethylether, and acetone have been measured in the gas phase. The assignment of the observed bands is discussed together with previously made observations on the fundamentals. Anharmonicity constants of the order of −200 and −100 cm−1 are determined for the most probable assignments from the available data for the H—F and D—F stretching vibrations (ν1) while their values in the "free" H—F and D—F molecules are −90 and −46 cm−1 respectively. The spectra are compatible with a coupling constant between the ν1 and the bridge stretching vibration (ν3) of the order of +70 cm−1.

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