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The Cannizzaro reaction, named after its discoverer Stanislao Cannizzaro, is a chemical reaction which involves the base-induced disproportionation of two molecules of a non-enolizable aldehyde to give a primary alcohol and a carboxylic acid. [1] [2]
Pivaldehyde is an organic compound, more specifically an aldehyde.Shown in the image is a line-angle representation of this organic aldehyde, whose systematic name, 2,2-dimethylpropanal, is based on the longest carbon chain (three carbon atoms), ending in "-al" to indicate the aldehyde functionality, and where another descriptive synonym is trimethylacetaldehyde. [2]
2,2,4-Trimethyl-1,2-dihydroquinoline (usually abbreviated TMQ, known historically as Acetone-anil) is an aminic antioxidant commonly used as a stabiliser in rubbers and some plastics. Synthesis [ edit ]
Pentaerythritol was first reported in 1891 by German chemist Bernhard Tollens and his student P. Wigand. [5] It may be prepared via a base-catalyzed multiple-addition reaction between acetaldehyde and 3 equivalents of formaldehyde to give pentaerythrose (CAS: 3818-32-4), followed by a Cannizzaro reaction with a fourth equivalent of formaldehyde to give the final product plus formate ion.
Trimethylolethane is produced via a two step process, starting with the condensation reaction of propionaldehyde with formaldehyde: CH 3 CH 2 CHO + 2 CH 2 O → CH 3 C(CH 2 OH) 2 CHO. The second step entails a Cannizzaro reaction: CH 3 C(CH 2 OH) 2 CHO + CH 2 O + NaOH → CH 3 C(CH 2 OH) 3 + NaO 2 CH. A few thousand tons are produced annually ...
The reaction is named after Russian organic chemist Vyacheslav Tishchenko, who discovered that aluminium alkoxides are effective catalysts for the reaction. [1] [2] [3] In the related Cannizzaro reaction, the base is sodium hydroxide and then the oxidation product is a carboxylic acid and the reduction product is an alcohol.
Paraldehyde can be produced by the direct reaction of acetaldehyde and sulfuric acid.The product of the reaction is dependent on the temperature. At room temperature and higher, the formation of trimer is preferred, but at lower temperatures, around −10 °C, the tetramer metaldehyde is more likely to be produced.
Acetaldehyde ammonia trimer is the cyclic trimer formed in the condensation reaction of acetaldehyde with ammonia: 3 CH 3 CHO + 3 NH 3 → (CH 3 CHNH) 3 + 3 H 2 O. The aldehyde ammonia does not need to be isolated as an intermediate. The configuration of the three methyl groups in thialdine can differ, so that multiple cis-trans isomers are ...