2 3, p. 2 377) investigated the condensation of pyroracemic acid, CH 3 CO 000H, with various aliphatic aldehydes, and obtained from two molecules of the acid and one of the aldehyde in the presence of baryta water alkylic isophthalic acids: with acetaldehyde [1.3.51-methylisophthalic acid or uvitic acid, C 6 H 3 CH 3 (000H) 2, was obtained, with propionic aldehyde [1.3.
Hydroxylic oxygen is obtained by subtracting the molecular refractions of acetic acid and acetaldehyde.
Grignard (Comptes Rendus, 1900 et seq.) showed that aldehydes combine with magnesium alkyl iodides (in absolute ether solution) to form addition products, which are decomposed by water with the formation of secondary alcohols, thus from acetaldehyde and magnesium methyl iodide, isopropyl alcohol is obtained.
Acetaldehyde, CH3ï¿½CHO, was first noticed by C. Scheele in 1774 and isolated and investigated by J.
(For trichloracetaldehyde see Chloral.) By the action of acetaldehyde on alcohol at Ioo° C., acetal, CH 3.
Thioaldehydes are also known, and are obtained by leading sulphuretted hydrogen into an aqueous solution of acetaldehyde.
The higher aldehydes of the series resemble acetaldehyde in their general behaviour.
It is prepared by oxidizing cinnamyl alcohol, or by the action of sodium ethylate on a mixture of benzaldehyde and acetaldehyde.
Scholtz (Ber., 1894, 2 7, p. 2 95 8) from piperonyl acrolein (the condensation product of piperonal and acetaldehyde) and acetic acid.
Traces of ethyl alcohol in solutions are detected and estimated by oxidation to acetaldehyde, or by conversion into iodoform by warming with iodine and potassium hydroxide.
Oxidation of ethyl alcohol gives acetaldehyde and acetic acid.
Chlorine oxidizes it to acetaldehyde, and under certain conditions chloral is formed.
It acts as an oxidizing agent, liberating iodine from potassium iodide, converting alcohol into acetaldehyde, &c.
It is readily soluble in water, melts at 193° C., and is decomposed at a higher temperature into chromium sesquioxide and oxygen; it is a very powerful oxidizing agent, acting violently on alcohol, converting it into acetaldehyde, and in glacial acetic acid solution converting naphthalene and anthracene into the corresponding quinones.
Potash fusion converts it into acetic acid; nitric acid oxidizes it to acetic and oxalic acids; chromic acid mixture to acetaldehyde and acetic acid, and potassium permanganate to a0-dioxybutyric acid.
This compound condenses in alkaline solution with compounds containing the grouping - CH 2 - CO - to form quinoline or its derivatives; thus, with acetaldehyde it forms quinoline, and with acetone, a-methyl quinoline.
In the preparation of chloroform by the action of bleaching powder on ethyl alcohol it is probable that the alcohol is ..rst oxidized to acetaldehyde, which is subsequently chlorinated and then decomposed.
The substance investigated was acetaldehyde, C 2 H 4 O, in its relation to paraldehyde, a polymeric modification.
in that mixture which contains 88% of paraldehyde and 12% of acetaldehyde, which the catalytic agent leaves unaffected.
Wurtz); by boiling a-chlorpropionic acid with caustic alkalis, or with silver oxide and water; by the reduction of pyruvic acid with sodium amalgam; or from acetaldehyde by the cyanhydrin reaction (J.
When heated with dilute sulphuric acid to 130° C., under pressure, it is resolved into formic acid and acetaldehyde.
Chromic acid oxidizes it to acetic acid and carbon dioxide; potassium permanganate oxidizes it to pyruvic acid; nitric acid to oxalic acid, and a mixture of manganese dioxide and sulphuric acid to acetaldehyde and carbon dioxide.
Drewson, Ber., 1883, 16, p. 2207); by passing the vapour of allyl aniline over heated lead oxide; by the condensation of ortho-aminobenzaldehyde with acetaldehyde in the presence of aqueous.
It is also formed by the condensation of anthranilic acid with acetaldehyde (S.
The cause of a hangover Consuming large volumes of alcohol causes by-products in your body, in particular a nasty chemical called acetaldehyde.
acetaldehyde dehydrogenase enzyme is primarily structured to work on ethanol.
Acetaldehyde still needs to be broken down into sugars and whatnot by the enzyme acetaldehyde still needs to be broken down into sugars and whatnot by the enzyme acetaldehyde dehydrogenase.
It was further commented that the DETR paper indicated that other simple aldehydes were generally present at lower concentrations than formaldehyde and acetaldehyde.
When heated with hydrochloric acid to Ioo C. it yields carbon dioxide and pyrotartaric acid, C 5 H 8 0 4, and when warmed with dilute sulphuric acid to 150Ã‚° C. it gives carbon dioxide and acetaldehyde.
CH3Ã¯¿½CHO+CH3MgI->CH3Ã¯¿½CH?Mg H2 /C1.3 The lower members of the aliphatic series are characterized by their power of polymerization (see Formalin, and the account of Acetaldehyde below), and also by the so-called "aldol" condensation, acetaldehyde in this way forming aldol, CH 3 Ã¯¿½[[ChohÃ¯¿½Ch 2 Ã¯¿½Cho]].
Acetaldehyde, CH3Ã¯¿½CHO, was first noticed by C. Scheele in 1774 and isolated and investigated by J.
(For trichloracetaldehyde see Chloral.) By the action of acetaldehyde on alcohol at IooÃ‚° C., acetal, CH 3.
CH(OH)Ã¯¿½NH 2j is formed when dry ammonia gas is passed into an ethereal solution of acetaldehyde.
It is readily soluble in water, melts at 193Ã‚° C., and is decomposed at a higher temperature into chromium sesquioxide and oxygen; it is a very powerful oxidizing agent, acting violently on alcohol, converting it into acetaldehyde, and in glacial acetic acid solution converting naphthalene and anthracene into the corresponding quinones.
When heated with dilute sulphuric acid to 130Ã‚° C., under pressure, it is resolved into formic acid and acetaldehyde.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.