Carboxylic acid

Question 1

Total method of prep of carboxylic acid

Answer 1

6
1) from primary alcohol and aldehyde
2) from alkyl benzene
3) from nitrile and amide
4) From gringnard reagent
5) From acyl halide and anhydride
6) from ester

Question 2

Prep of carboxylic acid from primary alcohol and aldehyde

Answer 2

For primary alcohol-strong oxidizing reagent
For aldehyde-mild oxidizing reagent

Question 3

Prep of carboxylic acid From alkyl benzene

Answer 3

By vigorous oxidation of alkyl benzene aromatic carboxylic acid can be formed
Reagent-KMnO4-KOH
To give intermediate of benzene attached to COOK and then hydrolysis to give benzoic acid (benzene attached to COOH)

Question 4

Prep of carboxylic acid From nitrile and amides

Answer 4

R-CN (H+ or OH-) give amide which again in presence of H+ or OH- give RCOOH + NH3

Question 5

Prep of carboxylic acid from gringnard reagent

Answer 5

Gringnard reagent+CO2 in presence of DE give salt of carboxylic acid which with H3O+ give RCOOH

Question 6

Prep of carboxylic acid from acyl halide and anhydride

Answer 6

RCOCl with H2O give RCOOH+Cl-
and with OH- Or H20 give RCOO- +Cl-
RCOO +H3O+ GIVE RCOOH

Question 7

Prep of carboxylic acid from ester

Answer 7

Acidic hydrolysis of ester directly give carboxylic acid while basic hydrolysis give carboxylate which on acidification give corresponding carboxylic acid

(Note along with carboxylic acid alcohol will also be formed of less chain)