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Title: Computational Study of the Malonic Acid Tautomerization Products in Highly Concentrated Particles

Journal Article · · Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory

Knowing the tautomeric form of malonic acid (MA) in concentrated particles is critical to understanding its effect on the atmosphere. Energies and vibrational modes of hydrated MA particles were calculated using density functional theory (DFT) at the B3LYP/6-31G(d,p) level and the effective fragment potential (EFP) method. Visualization of the keto and enol isomer vibrational modes enabled the assignment of keto isomer peaks in the 1710–1750 cm–1 range, and previously unidentified experimental IR peaks in the 1690–1710 cm–1 can now be attributed to the enol isomer. Furthermore, a comparison of calculated spectra of pure hydrated enol or keto isomers confirm recent experimental evidence, of a shift in the keto–enol tautomer equilibrium when MA exists as concentrated particles.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1347405
Report Number(s):
IS-J-9216
Journal Information:
Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory, Vol. 121, Issue 11; ISSN 1089-5639
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

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Cited By (2)

Self‐catalyzed keto‐enol tautomerization of malonic acid journal November 2019
Theoretical Study on the Epimerization of Azlactone Rings: Keto–Enol Tautomerism or Base-Mediated Racemization? journal March 2018