1971
DOI: 10.1016/0022-2860(71)87089-8
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The vibrational spectra of propanoic acid

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Cited by 31 publications
(5 citation statements)
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“…The same integration time of 9 min was utilized for the SFG spectra of ClEMA monomer. The ssp spectrum contains the peak at ∼2911 cm –1 and a shoulder positioned at ∼2928 cm –1 , which are assigned to the α-CH 3 symmetric C–H stretch ,, and α-CH 3 (sym) split by Fermi resonance interaction with the methyl bending modes, , respectively. In this polarization, the spectrum is dominated by the 2911 cm –1 peak originating from the symmetric CH 3 stretch of the α-CH 3 group.…”
Section: Resultsmentioning
confidence: 99%
“…The same integration time of 9 min was utilized for the SFG spectra of ClEMA monomer. The ssp spectrum contains the peak at ∼2911 cm –1 and a shoulder positioned at ∼2928 cm –1 , which are assigned to the α-CH 3 symmetric C–H stretch ,, and α-CH 3 (sym) split by Fermi resonance interaction with the methyl bending modes, , respectively. In this polarization, the spectrum is dominated by the 2911 cm –1 peak originating from the symmetric CH 3 stretch of the α-CH 3 group.…”
Section: Resultsmentioning
confidence: 99%
“…In the spectra of the latter the high-frequency relaxation is completely absent at low water content, thus suggesting a liquid structure that is formed by droplets of high carboxylic acid concentration in a suspending phase of high water concentration. However, carboxylic acids associate predominantly to cyclic dimers at small water content, while diols are expected to form almost fuzzy hydrogen-bonded chain structures, probably with high degree of branching. The tendency toward the formation of subphases seems, therefore, to be less pronounced in water/diol systems.…”
Section: Discussionmentioning
confidence: 99%
“…Figure 3 shows the typical time series monitored during the exposure of CH 3 CH 2 COOH to α-Al 2 O 3 . In comparison with the vibrational features of the liquid-phase (Jakobsen et al, 1971) and gas-phase CH 3 CH 2 COOH, the absence of the ν(OH) and ν(C=O) indicates that the physisorbed propionic acid is inexistent. Similar to the vibrational features of HCOOH and CH 3 COOH, the product of heterogeneous reaction between propionic acid and α-Al 2 O 3 is propionate.…”
Section: Figmentioning
confidence: 99%