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In the following reaction 

carbonyl\:\:compound +MeOH     acetal

Rate of the reaction is the highest for :

  • Option 1)

     Acetone as substrate and methanol in excess

  • Option 2)

    Propanol as substrate and methanol in stoichiometric amount

  • Option 3)

    Propanol as substrate and  methanol in excess

  • Option 4)

    Acetone as substrate and methanol in stoichiometric amount

Answers (1)

best_answer

 

 

Addition of aldehydes with alcohols -

Produces an unstable hemiacetal intermediate, which further produces acetal (gem - di alkoxy compounds)

- wherein

 

 

 

Addition of ketones with alcohols -

Produces an unstable hemiketal intermediate and further stable compound called ketal.

- wherein

 

 

 

 

 

 

 

 

 

 

 

 

 

Only (c ) is making acetal


Option 1)

 Acetone as substrate and methanol in excess

Option 2)

Propanol as substrate and methanol in stoichiometric amount

Option 3)

Propanol as substrate and  methanol in excess

Option 4)

Acetone as substrate and methanol in stoichiometric amount

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