i know how to make nitrobenzene once you have the electrophile, but my classnotes and revision guide conflict on how the NO2+ electrophile is formed from the reaction between concHNO3 and concH2SO4. My teacher said the guide is wrong "because H2NO3+ doesnt exist", but i'm still confused.
2H2SO4 + HNO3 --> H30+ + NO2+ + 2HSO4-
Revision guide says:
H2SO4 + HNO3 --> H2NO3+ + HSO4-
and then H2NO3+ loses water...
H2NO3+ --> H2O + NO2+
i think my teacher's version is right, but i wanna make sure. which one should I use in the exam?
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making nitrobenzene watch
- Thread Starter
- 23-06-2005 09:36
Offline17ReputationRep:Community AssistantStudy Helper
- Community Assistant
- Study Helper
- 23-06-2005 09:40
stage 1 - protonation of the oxygen on the nitric acid by the protons from the sulphuric acid
HONO2 + H+ --> H2O(+)NO2
Stage 2 - the water group leaves (assisted by the dehydrating nature of conc sulphuric acid)
H2O(+)NO2 --> H2O + NO2(+)