Tracer studies of carboxylic acids. 7. Oxygen-18 exchange of propionic acid with solvent water and with surfactant solubilized water in benzene

1978 ◽  
Vol 100 (18) ◽  
pp. 5910-5914 ◽  
Author(s):  
Terence D. Lomax ◽  
Charmian J. O'Connor
Keyword(s):  
Carboxylic Acids ◽  
Propionic Acid ◽  
Tracer Studies ◽  
Solvent Water

scholarly journals Heterogeneous chemistry of monocarboxylic acids on α-Al<sub>2</sub>O<sub>3</sub> at ambient condition

2010 ◽  
Vol 10 (2) ◽  
pp. 3937-3974 ◽  
Author(s):  
S. R. Tong ◽  
L. Y. Wu ◽  
M. F. Ge ◽  
W. G. Wang ◽  
Z. F. Pu
Keyword(s):  
Acetic Acid ◽  
Formic Acid ◽  
Carboxylic Acids ◽  
Propionic Acid ◽  
Ambient Condition ◽  
Heterogeneous Reactions ◽  
Dust Particles ◽  
Monocarboxylic Acids ◽  
Al2o3 Particles ◽  
Α Al2o3

Abstract. A study of the atmospheric heterogeneous reactions of formic acid, acetic acid, and propionic acid on dust particles (α-Al2O3) was performed at ambient condition by using a diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) reactor. From the analysis of the spectral features, observations of carboxylates formation provide strong evidence for an efficient reactive uptake process. Comparison of the calculated and experimental vibrational frequencies of adsorbed carboxylates establishes the bridging coordinated structures on the surface. The uptake coefficients of formic acid, acetic acid, and propionic acid on α-Al2O3 particles are (2.07±0.26)×10−3, (5.00±0.69)×10−3, and (3.04±0.63)×10−3, respectively (using geometric area). Besides, the effect of various relative humid (RH) on this heterogeneous reactions was studied. The uptake coefficients of monocarboxylic acids on α-Al2O3 particles increase initially (RH<20%) and then decrease with the increased RH (RH>20%) which was due to the effect of water on carboxylic acids solvation, particles surface hydroxylation, and competition on reactive site. On the basis of the results of experimental simulation, the mechanism of heterogeneous reaction of dust with carboxylic acids at ambient condition was discussed. The loss of atmospheric monocarboxylic acids due to reactive uptake on available mineral dust particles can be competitive with homogeneous loss pathways, especially in dusty urban and desertified environments.

Excess Gibbs energy for binary mixtures of acetonitrile with acetic acid, propionic acid, isobutyric acid, and trimethylacetic acid

1991 ◽  
Vol 69 (12) ◽  
pp. 2117-2121 ◽  
Author(s):  
T. S. Banipal ◽  
B. S. Lark ◽  
S. Singh
Keyword(s):  
Acetic Acid ◽  
Gibbs Energy ◽  
Carboxylic Acids ◽  
Propionic Acid ◽  
Binary Mixtures ◽  
Activity Coefficients ◽  
Excess Gibbs Energy ◽  
Composition Range ◽  
Isobutyric Acid ◽  
Dimerization Constant

Total vapour pressures for binary mixtures containing acetic acid, propionic acid, isobutyric acid, and trimethylacetic acid with acetonitrile have been measured for the entire composition range at 298.15 and 318.15 K using a static manometric method. All systems show positive deviations from Raoult's law, enhanced by both an increase in temperature and an increase in the methylation of acetic acid. Activity coefficients have been calculated by taking into consideration the dimerization of these carboxylic acids in the vapour phase. TSE values obtained from GE and earlier reported HE values are found to be negative for acetic acid, about zero for propionic and isobutyric acids, and positive for trimethylacetic acid for the whole composition range. The results have been interpreted in terms of various contributions such as depolymerization, heteromolecular dipole–dipole interactions, and the increasing dimerization constant and steric hindrance with increase of complexity of the acid. Key words: excess Gibbs energy, carboxylic acids, acetonitrile, activity coefficients

672. Tracer studies in ester hydrolysis. Part VIII. The oxygen exchange between water and carboxylic acids

1960 ◽  
pp. 3364 ◽  
Author(s):  
C. A. Bunton ◽  
D. H. James ◽  
J. B. Senior
Keyword(s):  
Carboxylic Acids ◽  
Ester Hydrolysis ◽  
Oxygen Exchange ◽  
Tracer Studies

Tracer Studies with Radioactive Carbon: The Oxidation of Propionic Acid

1941 ◽  
Vol 63 (8) ◽  
pp. 2275-2276 ◽  
Author(s):  
P. Nahinsky ◽  
S. Ruben
Keyword(s):  
Propionic Acid ◽  
Tracer Studies ◽  
Radioactive Carbon

ChemInform Abstract: Acylamides of C-Germyl Carboxylic Acids (III). Crystal and Molecular Structure of 3-(Trichlorogermyl)propionic Acid N-Acetyl-N-methylamide ( IIIa).

ChemInform ◽  
2010 ◽  
Vol 25 (21) ◽  
pp. no-no
Author(s):  
A. K. NURIDZHANYAN ◽  
S. N. GURKOVA ◽  
A. I. GUSEV ◽  
V. F. MIRONOV
Keyword(s):  
Molecular Structure ◽  
Carboxylic Acids ◽  
Propionic Acid ◽  
Crystal And Molecular Structure

391. Tracer studies in carboxylic acids. Part III. Oxalic acid

1965 ◽  
pp. 2197 ◽  
Author(s):  
Charmian O'Connor ◽  
D. R. Llewellyn
Keyword(s):  
Oxalic Acid ◽  
Carboxylic Acids ◽  
Tracer Studies
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