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How does H2SO4 help in the formation of NO2 + from HNO3 during the electrophilic substituion reactions ???


How does H2SO4 help in the formation of NO2 + from HNO3 during the electrophilic substituion reactions ???


Grade:11

2 Answers

Ashwin Muralidharan IIT Madras
290 Points
9 years ago

Hi Swapnil,

 

Conc H2SO4 is more acidic than HNO3. Hence in this reaction HNO3 will act as if it were a base, acception H+ from H2SO4, becoming H2NO3+...... now this with conc H2SO4 (also a dehydrating agent will absorb water) -----> H2O + NO2+

That is how it is generated in the mixture.

Hope it helps.

 

Best Regards,

Ashwin (IIT Madras).

samarth saxena
37 Points
9 years ago

Highly concentrated H2SO4 protonate Con. Nitric Acid and eliminate water molecule to generate nitronium ion which attach benzene ring via. electrophilic substitution reaction and forms nitro benzene.

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