Question

When 780 g of benzene (Molar mass = 78 g/mol) reacts with 750 mL of concentrated HNO3 (16 M) and 750 mL of H2SO4 (18 M), 1000 g of nitrobenzene (molar mass = 123 g/mol) and 250 g of an unknown compound with a high boiling point are obtained.

c. Give the name of the most probable side product with the high melting point. Explain why.

e. Supposing the crystalline compound (250 g) has the formula C6H4N2O4, calculate the yield of this side product. (Please show work..what are you using as the limiting reagent?)

Answer 1

NO2 NO2 HNO3 H2SO4 NO2 1000 g 250 g Molar mass 780 g/mol c) Name of the most probable side product: di nitro benzene. Increase in temperature triggers the further reaction between nitrobenzene and nitronium ion (NO2t). Nitro group in nitro benzene is meta-directing group, so it directs the incoming nitronium ion to meta-position and results in the formation of m-dinitrobenzene 250 1 x100-14.88% (Here 10 mole is starting material) e) Yield of the side product × 168 10