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    • Thread Starter

    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.

    Teacher says:
    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?

    • Community Assistant
    • Study Helper

    Community Assistant
    Study Helper
    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(+)
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Updated: June 23, 2005
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