Answer
Verified
376.2k+ views
Hint:The chemical reactions mentioned in the question are either involved aldehydes or ketones or both. Aldehydes and ketones belong to the category of organic compounds, containing a carbonyl group that is a carbon atom in the molecule attached to one double bonded oxygen atom. For both aldehydes and ketones, the carbonyl group serves as the functional group.
Complete answer:
In the chemical conversions mentioned above, ketone is converted to aldehyde or vice-versa or aldehyde or a ketone undergoing a chemical reaction to produce different compounds. Let us see how these conversions are carried out in single or two steps.
1. Propanone, commonly known as acetone is a ketone containing 3 carbon atoms and one carbonyl group. The chemical formula of propanone is $[C{H_3}COC{H_3}]$.
Propene, an alkene, an unsaturated organic compound, containing one double bond.
Propanone is converted to 2-propanol on reduction by metal hydride in ether followed by dehydration to form propene.
2. The compounds containing carboxylic group ($[ - COOH]$) as a functional group, that is compounds containing a carbonyl group bonded to the hydroxyl group are categorised as carboxylic acids.
Benzoic acid is a carboxylic acid of benzene.
In the first step, chlorination of benzoic acid by thionyl chloride leads to the formation of benzoyl chloride followed by reduction using Rosenmund’s reduction. Rosenmund’s reduction is carried out using hydrogen over palladium, poisoned by barium sulphate which selectively reduces acyl chloride to aldehyde.
3. Ethanol, commonly known as ethyl alcohol or spirit is an alcohol. The compound, 3-hydroxybutanal is an aldol, a compound containing both hydroxyl ($[ - OH$]) group and aldehyde group ($[ - CHO$]).
Ethanol when heated with copper produces an aldehyde, which then undergoes Aldol condensation to form 3-hydroxybutanal. During Aldol condensation, an alcohol with at least one α-H atom is converted into $\beta - $hydroxy aldehyde in presence of dilute alkali. The dilute alkali acts as a catalyst in Aldol condensation.
4. Benzene, an aromatic compound of molecular formula $[{C_6}{H_6}$]. The compound m-nitroacetophenone is a derivative of acetophenone with molecular formula, $[{C_8}{H_7}N{O_3}$].
Through Friedel-Craft Acylation, benzene is first converted into acetophenone, followed by treatment with conc. nitric acid and conc. sulphuric acid to insert nitro group in the molecule.
Friedel-Craft Acylation is an aromatic substitution reaction in which an acyl group is inserted on one of the carbon atoms of the aromatic ring.
Benzophenone is an aromatic compound containing two phenyl rings bonded with a carbonyl group.
5. Benzophenone can be prepared using benzaldehyde by reacting it with Grignard reagent, followed by hydrolysis. In the next step, the compound formed can be oxidised using chromium trioxide to obtain benzophenone.
6. The bromobenzene, benzene’s halogen derivative, when treated with Grignard’s reagent yields Phenyl magnesium bromide in the first step. In the second step, phenyl magnesium bromide is treated with acetaldehyde and water respectively to produce 1-phenylethanol.
7. The cross-aldol condensation reaction between benzaldehyde and acetaldehyde produces cross aldol product which on catalytic hydrogenation yields 3-Phenylpropan-1-ol. The cross-aldol condensation takes place between either two different aldehydes or ketones.
8. Benzaldehyde can be converted into $\alpha - $Hydroxyphenylacetic acid by insertion of cyano group followed by hydrolysis.
9. Benzoic acid on reduction followed by nitration produces m-nitrobenzyl alcohol.
Note:
1. While converting propanone to propene, reduction of propanone can be carried out by using $[NaB{H_4}]$ or $[{H_2}/Pt$].
2. The chlorination of benzoic acid to benzoyl chloride can be carried out using $[PC{l_5}]$ .
3. Ethanol can be converted into ethanal by using chromium trioxide, $[Cr{O_3}]$.
4. Benzaldehyde can be converted into Benzophenone by oxidation of benzaldehyde by $[KMN{O_4}$], followed by decarboxylation and benzoylation respectively.
Complete answer:
In the chemical conversions mentioned above, ketone is converted to aldehyde or vice-versa or aldehyde or a ketone undergoing a chemical reaction to produce different compounds. Let us see how these conversions are carried out in single or two steps.
1. Propanone, commonly known as acetone is a ketone containing 3 carbon atoms and one carbonyl group. The chemical formula of propanone is $[C{H_3}COC{H_3}]$.
Propene, an alkene, an unsaturated organic compound, containing one double bond.
Propanone is converted to 2-propanol on reduction by metal hydride in ether followed by dehydration to form propene.
2. The compounds containing carboxylic group ($[ - COOH]$) as a functional group, that is compounds containing a carbonyl group bonded to the hydroxyl group are categorised as carboxylic acids.
Benzoic acid is a carboxylic acid of benzene.
In the first step, chlorination of benzoic acid by thionyl chloride leads to the formation of benzoyl chloride followed by reduction using Rosenmund’s reduction. Rosenmund’s reduction is carried out using hydrogen over palladium, poisoned by barium sulphate which selectively reduces acyl chloride to aldehyde.
3. Ethanol, commonly known as ethyl alcohol or spirit is an alcohol. The compound, 3-hydroxybutanal is an aldol, a compound containing both hydroxyl ($[ - OH$]) group and aldehyde group ($[ - CHO$]).
Ethanol when heated with copper produces an aldehyde, which then undergoes Aldol condensation to form 3-hydroxybutanal. During Aldol condensation, an alcohol with at least one α-H atom is converted into $\beta - $hydroxy aldehyde in presence of dilute alkali. The dilute alkali acts as a catalyst in Aldol condensation.
4. Benzene, an aromatic compound of molecular formula $[{C_6}{H_6}$]. The compound m-nitroacetophenone is a derivative of acetophenone with molecular formula, $[{C_8}{H_7}N{O_3}$].
Through Friedel-Craft Acylation, benzene is first converted into acetophenone, followed by treatment with conc. nitric acid and conc. sulphuric acid to insert nitro group in the molecule.
Friedel-Craft Acylation is an aromatic substitution reaction in which an acyl group is inserted on one of the carbon atoms of the aromatic ring.
Benzophenone is an aromatic compound containing two phenyl rings bonded with a carbonyl group.
5. Benzophenone can be prepared using benzaldehyde by reacting it with Grignard reagent, followed by hydrolysis. In the next step, the compound formed can be oxidised using chromium trioxide to obtain benzophenone.
6. The bromobenzene, benzene’s halogen derivative, when treated with Grignard’s reagent yields Phenyl magnesium bromide in the first step. In the second step, phenyl magnesium bromide is treated with acetaldehyde and water respectively to produce 1-phenylethanol.
7. The cross-aldol condensation reaction between benzaldehyde and acetaldehyde produces cross aldol product which on catalytic hydrogenation yields 3-Phenylpropan-1-ol. The cross-aldol condensation takes place between either two different aldehydes or ketones.
8. Benzaldehyde can be converted into $\alpha - $Hydroxyphenylacetic acid by insertion of cyano group followed by hydrolysis.
9. Benzoic acid on reduction followed by nitration produces m-nitrobenzyl alcohol.
Note:
1. While converting propanone to propene, reduction of propanone can be carried out by using $[NaB{H_4}]$ or $[{H_2}/Pt$].
2. The chlorination of benzoic acid to benzoyl chloride can be carried out using $[PC{l_5}]$ .
3. Ethanol can be converted into ethanal by using chromium trioxide, $[Cr{O_3}]$.
4. Benzaldehyde can be converted into Benzophenone by oxidation of benzaldehyde by $[KMN{O_4}$], followed by decarboxylation and benzoylation respectively.
Recently Updated Pages
Basicity of sulphurous acid and sulphuric acid are
Three beakers labelled as A B and C each containing 25 mL of water were taken A small amount of NaOH anhydrous CuSO4 and NaCl were added to the beakers A B and C respectively It was observed that there was an increase in the temperature of the solutions contained in beakers A and B whereas in case of beaker C the temperature of the solution falls Which one of the following statements isarecorrect i In beakers A and B exothermic process has occurred ii In beakers A and B endothermic process has occurred iii In beaker C exothermic process has occurred iv In beaker C endothermic process has occurred
What is the stopping potential when the metal with class 12 physics JEE_Main
The momentum of a photon is 2 times 10 16gm cmsec Its class 12 physics JEE_Main
How do you arrange NH4 + BF3 H2O C2H2 in increasing class 11 chemistry CBSE
Is H mCT and q mCT the same thing If so which is more class 11 chemistry CBSE
Trending doubts
Difference Between Plant Cell and Animal Cell
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Fill the blanks with proper collective nouns 1 A of class 10 english CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Select the word that is correctly spelled a Twelveth class 10 english CBSE
What organs are located on the left side of your body class 11 biology CBSE
What is the z value for a 90 95 and 99 percent confidence class 11 maths CBSE
Give 10 examples for herbs , shrubs , climbers , creepers