2-Butanone, naming

Ketones may also be named using functional class lUPAC nomenclature by citing the two groups attached to the carbonyl m alphabetical order followed by the word ketone Thus 3 methyl 2 butanone (substitutive) becomes isopropyl methyl ketone (functional class)... 

Chemical Name 4-(1-Pyrrolidinyl)-1-(2,4,6-trimethoxyphenyl)-1-butanone Common Name —... 

Chemical Name 1 - [2-[3-[(1,1 -Dimethylethyl)amino]-2-hydroxypropoxy] -5-fluorophenyl] 1 -butanone... 

Chemical Name 4-[4-(4-Chlorophenyl)-4-hydroxy-1 -piperidinyll -1-(4-fluorophenyl-1-butanone... 

Chemical Name 1 -(4-Fluorophenyl)-4-(4-methyl-1-piperidinyl)-1 -butanone Common Name Flubuperone methylperone... 

DimethyI-2 3-butanediol has the common name piiuicol. On heating with aqueous acid, pinacol rearranges to pinacolone, 3,3-dimethyl-2-butanone. Suggest a mechanism for this reaction. 

CA name 3,3-dimethyl-l-(methylthio)-2-butanone 0-[(methylamino) carbonyljoxime CAS RN [39196-18-4]... 

Chemical name 2-Butanone Molecular weight 72.10 Formula C4HgO Density 0.805 g ml-1 Volatility Medium... 

The results indicate that the product ratio is determined by the competition between the various reaction steps. Under base-catalyzed conditions, 2-butanone reacts with benzaldehyde at the methyl group to give l-phenylpent-l-en-3-one. Under acid-catalyzed conditions, the product is the result of condensation at the methylene group, namely, 3-methyl-4-phenylbut-3-en-2-one. Under the reaction conditions used, it is not possible to isolate the intermediate ketols, because the addition step is rate-limiting. These intermediates can be... 

Problem 15.47 Give another acceptable name for each of the following (a) dimethyl ketone, (b) l-phenyl-2-butanone, (c) ethyl isopropyl ketone, (d) dibenzyl ketone, (e) vinyl ethyl ketone. ... 

Pinacol rearrangement is a dehydration of a 1,2-diol to form a ketone. 2,3-drmethyl-2,3-butanediol has the common name pinacol (a symmetrical diol). When it is treated with strong acid, e.g. H2SO4, it gives 3,3-dimethyl-2-butanone (methyl r-butyl ketone), also commonly known as pinacolone. The product results from the loss of water and molecular rearrangement. In the rearrangement of pinacol equivalent carbocations are formed no matter which hydroxyl group is protonated and leaves. 

Butonone Peroxide Dimer, MethylethyI ketone Peroxide, (C4H8Oz)2 mw 176.21, O 36.20% col thick oil, haying a pleasant odor stable at RT but explodes when heated above 100°, d 1.042 was obtd when butanone was treated with H202 in the presence of H2S04 sol in ale, eth or benz insol in w. The compd is completely reduced to methylethylketone by the action of nascent H in the cold it explodes violently when placed in contact with coned H2S04. Butanone peroxide is sold under the trade name "Lupersol DDM , by Wallace Tiernen, Inc, Buffalo, NY(Ref 3) Refs l)Beil 1, 6.68 2)J.Pastureau, CR 144,... 

Chemical Name 1-Butanone, l-(4-fluorophenyl)-4-(4-(2-pyridinyl)-l-piperazinyl)-... 

Chemical Name l-[4-(l,l-Dimethylethyl)phenyl]-4-[4-(diphenylmethoxy)-l-piperidinyl]-l-butanone... 

Chemical Name l -(4-chlorophenoxy)-3,3-dimethyl-l -(1H-1,2,4-triazol-1 -yl)butanone l-(4-chlorophenoxy)-3,3-dimethyl-1 -(IH-1,2,4-triazol-1 -yl)-2-butanone CAS Registry No 43121-43-3... 

In naming ketones, the final -e of the parent name is replaced by -one. The location of the double-bonded oxygen is shown by use of the carbon chain numbering system described earlier. For example, in 2-butanone, the carbon chain has four carbon atoms... 

Solutions The first compound has four carbon atoms and the functional group is called a carboxylic acid. The name is of this compound is butanoic acid. The second compound has four carbon atoms and a ketone group on the second carbon (using the lowest number). This is 2-butanone. The third compound is butanal, the ending -al tells that it is an aldehyde. The final compound has three carbon atoms bonded to the single bonded oxygen. This part is called propyl. Because there are two carbon atoms in a chain bonded to the carbonyl group this part is called ethanoate. This molecule is called propylethanoate. 

Molecular formula C4H8O Synonyms and trade names 2-butanone... 

Explain why no addresses (positional numbers) need to be used in the names (a) butanal and (b) butanone. 

Common Name Methyl ethyl ketone Synonym 2-butanone, butan-2-one, MEK Chemical Name 2-butanone, methyl ethyl ketone CAS Registry No 78-93-3 Molecular Formula C4H8O, CH3CH2COCH3 Molecular Weight 72.106 Melting Point (°C) ... 

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