Acetio acid

This is an alternative experiment to the actual preparation of the ester and will give the student practice in conducting a distillation under diminished pressure. Commercial ethyl acetoacetate generally contains inter alia some ethyl acetate and acetio acid these are removed in the following procedure. 

A simple application of the reaction may be mentioned. Refluxing of (I) with 48 per cent, hydrobromic acid and glacial acetio acid leads to hydrolysis and decarboxylation and the production of a mixture of the y-lactone yy-di-phenylbutyrolaotone (II) and the isomeric unsaturated acid yy-diphenyl-rinylacetic acid (III) reduction by the Clemmensen method or catalytically... 

Dibromofluorescein is prepared by treating fluorescein in 80 per cent, acetio acid solution with the theoretical quantity of bromine. 

TABLE REPRESENT-IKa THE PER CENTAOB OF AMMONIA, NAPHTHA, ACETIO ACID, FAHAPFIKT, AK OUD, OBTAINED... 

Three a -epoxy ketones reported by Bodiuros1 188 to undergo reduction to the corresponding ccjS-unsaturated ketones on treatment with potassium iodide in. acetio acid are shown in Eqa. (407) and (403). 

The difference in mechanisms of addition of trifluoroacetic acid (see above) and HC1 (in acetio acid) to 3-hexyne has been tentatively explained as due to the different nucleophilic and ionizing power of the two solvents. 

Rearrangements have been observed in the case of aryloxyacetic acids a-substituted by an aryl group (96, R = H, R = Ph, X = OH), which give 3-phenyl-2(3H)-benzofuranone (98). 2,4-Dichlorophenoxy-acetio acid and its chloride do not undergoring closure by any method. ... 

Sulfurio-acetio acid mixture used for oyolisation. 

T - 2,4,5-trichlorophenoxyacetic acid DDA - bis(4-chlorophenyl)-acetio acid PAA - phenylacetlc acid HP - hepatopancreas ... 

The acetio acid used in the arts and in pharmacy is prepared by the destructive diatiUatiou of wood. The products of the distiUation, which vary with the nature of the wood used, are numerous. Charcoal remains in the retort, while the distilled product consists of an acid, wateiy liquid a tany material and gaseous producta The gases are carbon dioxide, carbon monoxide, and hydrocarbons they are sometimes used for illuminating purposes, but are usually directed into the furnace, where they serve as fuel. The tar is a mixture of empyreuznatsc oils, hydrocarbons, phenol, oxyphenol, acetic acid, ammonium acetate, etc. 

TJ. S.), is obtained decompositiou of a pore dry acetate by best Pi pxiinBS.—Acetio acid is a colorless liquid. Below 17° (62°. 

Dilute Acetic Acid. Tho U. S. Pharmacopeia directs 1 pint acetio acid to be mixed with 7 pints distilled water, producing an acid of specific gravity 1.006 100 grains of dilute acetic acid saturate 7.6 grains mcarbon-ate of potassa. 

Hydrosulphuret of ammonia does the samo with neutrm solutions in very dilute solutions the precipitate is blackish-greeu the precipitate in both cases being soluble in muriatio and acetio acids. 

Hall s Solution of Stiycfania. Take pure crystals of strychnia. Id grains water and alcoht) , of each 7 i ounces acetio acid and compound tincture of cardamoms, of each 4 ounce. Mix for solution. Dose, 20 to 30 drops, once or twice a day. 

Formation.—1. By the oxidation of the normal alcohols of the methyl series, aa in the conversion of alcohol into acetio acid by heating it with a solution of chromic acid... 

The salts of acetio acid in which the hydrogen of the oxatyl is replaced by monad metals have the general formula... 

Borne of the eeoondary aoida also give acetio acid when treated with fitted potassio hydrate j but this can only happen when the dyad radical Is ethylene, thus... 

These reactions ate the analogues, in the dyad series, of the one by which marsh-gas iB obtained from acetio acid. The hydrides of the dyad radicals so obtained are isomeric with those of the corresponding monad radicals,... 

There are two fermentation methods of producing acetone (CH COCH ). Amylaceous products may be fermented either into acetio acid from which acetone may be made or they may be fermented directly to acetone, alcohols, etc. Previous to the World War the acetone of commerce was prepared by the destructive distillation of calcium acetate but with the increased demands for the product in the manufacture of smokeless gun powder and as a solvent, the less expensive direct fermentation method known as the Femback method was developed. 

The acid may also be crystaUised from glacial acetio acid. 

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