Acids, organic aromatic

SOME AROMATIC PEROXIDES AND PER-ACIDS Organic peroxides may be prepared —... 

To hydrolyse an ester of a phenol (e.g., phenyl acetate), proceed as above but cool the alkaline reaction mixture and treat it with carbon dioxide until saturated (sohd carbon dioxide may also be used). Whether a solid phenol separates or not, remove it by extraction with ether. Acidify the aqueous bicarbonate solution with dilute sulphuric acid and isolate the acid as detailed for the ester of an alcohol. An alternative method, which is not so time-consuming, may be employed. Cool the alkaline reaction mixture in ice water, and add dilute sulphuric acid with stirring until the solution is acidic to Congo red paper and the acid, if aromatic or otherwise insoluble in the medium, commences to separate as a faint but permanent precipitate. Now add 5 per cent, sodium carbonate solution with vigorous stirring until the solution is alkaline to litmus paper and the precipitate redissolves completely. Remove the phenol by extraction with ether. Acidify the residual aqueous solution and investigate the organic acid as above. 

Organic aromatic molecules are usually sweet, bitter, a combination of these, or tasteless, probably owing to lack of water solubiUty. Most characteristic taste substances, especially salty and sweet, are nonvolatile compounds. Many different types of molecules produce the bitter taste, eg, divalent cations, alkaloids, some amino acids, and denatoirium (14,15). 

Furthermore, the injection of organic aromatic solvents and soaking is a feasible method to remove the precipitates [924]. The precipitation of asphalt from crude oil can be reduced by adding an N,N-dialkylamide of a fatty acid [1525,1527]. When asphaltenes are precipitated out, they can be removed from the walls of a well, pipeline, and so forth by washing with a hydrocarbon solvent. However, it has been shown that isopropyl benzoate is exceptionally useful as a solvent for asphaltene removal [1583]. 

Nitrosyl perchlorate Organic materials Perchloric acid Alcohols Permanganic acid Organic materials Peroxodisulfuric acid Organic liquids Potassium dioxide Ethanol Potassium perchlorate Ethanol Potassium permanganate Ethanol, etc. Ruthenium(VIII) oxide Organic materials Silver perchlorate Aromatic compounds Sodium peroxide Hydroxy compounds Uranium hexafluoride Aromatic hydrocarbons, etc. Uranyl perchlorate Ethanol See v-halomides Alcohols... 

Nitric acid Nitroaromatics, or Nitrobenzene Peroxodisulfuric acid Organic liquids Sodium chlorate Nitrobenzene Tetranitromethane Aromatic nitro compounds Uronium perchlorate Organic materials... 

Ozone Aromatic compounds, or Benzene, etc. MRH Benzene 12.05/75 Permanganic acid Organic materials Peroxodisulfuric acid Organic liquids Peroxomonosulfuric acid Aromatic compounds... 

Perchloryl fluoride Nitrogenous bases Peroxodisulfuric acid Organic liquids Peroxomonosulfuric acid Aromatics Peroxyformic acid Organic materials Sodium peroxide Organic liquids, etc. 

This is the second type of acylation reaction. However, in this type the xenobiotic itself is activated, and it is therefore a type 2 reaction. Organic acids, either aromatic such as salicylic... 

The add is slowly hydrolysed by water at 25°Cj rapidly at higher temperatures. Warm alkaline solutions decompose the material to form sulfates and unstable imine organic aromatic compounds. Aqueous acids cause reversion... 

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