Reaction Mechanism of the Decomposition of Acetic Acid on Illuminated TiO2Powder Studied by Means ofin SituElectron Spin Resonance Measurements

Langmuir ◽  
1996 ◽  
Vol 12 (3) ◽  
pp. 736-738 ◽  
Author(s):  
Yoshio Nosaka ◽  
Katsuchika Koenuma ◽  
Kiminori Ushida ◽  
Akira Kira
Keyword(s):  
Acetic Acid ◽  
Reaction Mechanism ◽  
Spin Resonance

Theoretical study of the ketonization reaction mechanism of acetic acid over SiO2

2009 ◽  
Author(s):  
Mendel Fleisher ◽  
E. Lukevics ◽  
L. Leite ◽  
D. Jansone ◽  
K. Edolfa ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Reaction Mechanism ◽  
Theoretical Study

scholarly journals Synthesis of spiro[dihydropyridine-oxindoles] via three-component reaction of arylamine, isatin and cyclopentane-1,3-dione

2013 ◽  
Vol 9 ◽  
pp. 8-14 ◽  
Author(s):  
Yan Sun ◽  
Jing Sun ◽  
Chao-Guo Yan
Keyword(s):  
Acetic Acid ◽  
Reaction Mechanism ◽  
Room Temperature ◽  
The Other ◽  
Other Hand ◽  
Three Component Reaction ◽  
High Yields

A fast and convenient protocol for the synthesis of novel spiro[dihydropyridine-oxindole] derivatives in satisfactory yields was developed by the three-component reactions of arylamine, isatin and cyclopentane-1,3-dione in acetic acid at room temperature. On the other hand the condensation of isatin with two equivalents of cyclopentane-1,3-dione gave 3,3-bis(2-hydroxy-5-oxo-cyclopent-1-enyl)oxindole in high yields. The reaction mechanism and substrate scope of this novel reaction is briefly discussed.

scholarly journals Antioxidant activity of Induna apple pomace extract

2005 ◽  
pp. 239-246 ◽  
Author(s):  
Sladjana Savatovic ◽  
Sonja Djilas ◽  
Vesna Tumbas ◽  
Jasna Canadanovic-Brunet ◽  
Gordana Cetkovic
Keyword(s):  
Aqueous Solution ◽  
Antioxidant Activity ◽  
Acetic Acid ◽  
Electron Spin Resonance ◽  
Hydroxyl Radicals ◽  
Electron Spin ◽  
Esr Spectroscopy ◽  
Methanol Extract ◽  
Apple Pomace ◽  
Spin Resonance

Different concentrations ofmethanol aqueous solution with or without 0.5% acetic acid and 80% acetone were used to achieve the highest yield of extraction of phenolics from Induna apple pomace. The highest content of phenolics (6.38 mg/g) was detected in the 80% methanol extract. The influence of 80% methanol extract of Induna apple pomace on stable l,l-diphenyl-2-picrylhydrazyl (DPPH) and reactive hydroxyl radicals has been investigated by electron spin resonance (ESR) spectroscopy. Based on the obtained results it can be concluded that the investigated extract is more effective in the DPPH test than on the DMPO-OH scavenging. In both cases antioxidant activity increased with increasing concentration of the investigated extract. The high contents ofphenolics (6.38 mg/g), flavonoids (1.01 mg/g) and flavan-3-ols (0.70 mg/g) in 80% methanol extract indicated that these compounds contributed to the antioxidant activity of Induna apple pomace.

N-Aminopyrimidines: The Isomerization of 1-Aminobarbituric Acids to 2-(5-Oxo-4,5-dihydro-1H-1,2,4-triazol-3-yl) Aliphatic Acids

1979 ◽  
Vol 32 (1) ◽  
pp. 161 ◽  
Author(s):  
NW Jacobsen ◽  
BL McCarthy ◽  
S Smith
Keyword(s):  
Acetic Acid ◽  
Reaction Mechanism ◽  
Isomerization Reaction ◽  
Aliphatic Acids ◽  
Aqueous Acid

1-Aminobarbituric acid undergoes a facile isomerization in aqueous acid to 2-(5-oxo-4,5-dihydro-lH-l,2,4-triazol-3-yl)acetic acid which in turn can be decarboxylated to give 3-methyl-1H-1,2,4- triazol-5(4H)-one. The isomerization reaction is shown to be a general one, adaptable to the synthesis of oxotriazolyl aliphatic acids and their decarboxylated products. A reaction mechanism for the isomerization is proposed.

CO2 laser-induced decomposition of acetone, 2,3-butanedione and cyclobutanone sensitized by sulfur hexafluoride

1980 ◽  
Vol 45 (6) ◽  
pp. 1805-1811 ◽  
Author(s):  
Josef Pola ◽  
Josef Vítek ◽  
Milan Horák ◽  
Pavel Engst
Keyword(s):  
Acetic Acid ◽  
Reaction Mechanism ◽  
Partial Pressure ◽  
Decomposition Rate ◽  
Laser Power ◽  
Sulfur Hexafluoride ◽  
Buffer Gas ◽  
Sulphur Hexafluoride ◽  
Pyrolytic Products ◽  
Induced Decomposition

The CO2 cw laser powered homogeneous pyrolysis (LPHP) of acetone, 2,3-butanedione and cyclobutanone (all 1.3 - 4kPa) sensitized by sulphur hexafluoride (0.7-1.3kPa) was investigated. The decomposition course of the ketones is analogous to that occuring under conventional pyrolytic conditions. The decomposition rate and the product composition are affected by laser power, partial pressure of the sensitizer, and the buffer gas (helium) added. Besiedes the conventional pyrolytic products, the LPHP of acetone and 2,3-butanedione affords acetylene and that of cyclobutanone produces acetic acid. A possible reaction mechanism of the decompositions is discussed.

Study the reaction mechanism of catalytic reforming of acetic acid through the instantaneous gas production

2019 ◽  
Vol 44 (39) ◽  
pp. 21279-21289 ◽  
Author(s):  
Andong Zhang ◽  
Zhihe Li ◽  
Weiming Yi ◽  
Peng Fu ◽  
Lihong Wang ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Reaction Mechanism ◽  
Gas Production ◽  
Catalytic Reforming
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