Monocarboxylic Acid Assignment Help

Assignment Help: >> Carboxylic acid and their Derivatives >> Monocarboxylic Acid

Methods of preparation of monocarboxylic acid

(1) By oxidation of alcohols, aldehydes and ketones

            66_monocarboxylic acid.png

  •           Aldehyde may be oxidized to carboxylic acid with mild oxidising agents such as ammonical silver nitrate solution [Ag2O or Ag(NH3)+OH-]        
  • q Methanoic acid cannot be prepared by oxidation method.
  •           Ketones can be oxidized under drastic conditions using strong oxidising agent like K2Cr2O7 .
  •           Methyl ketones may also be replaced to carboxylic acid through the haloform reaction.

         1557_monocarboxylic acid.png

(2) By Hydrolysis of nitriles, anhydrides, acid chloride and ester

         (i) Hydrolysis of nitriles

970_monocarboxylic acid1.png

(ii) Hydrolysis of Esters

         1626_monocarboxylic acid2.png

 (3) From Grignard Reagent

12_monocarboxylic acid3.png

 

(4) From Alkene or Hydro-carboxy-addition (koch reaction)

         268_monocarboxylic acid4.png

(5) Special methods

         (i) Carboxylation of sodium alkoxide     

         1681_monocarboxylic acid5.png

         (ii) Action of heat on dicarboxylic acid  

1354_monocarboxylic acid6.png

         (iii) The Arndt-Eistert synthesis  

         906_monocarboxylic acid7.png

(iv) From acid amides   

718_monocarboxylic acid8.png

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