What happens when pyridine is treated with fuming sulphuric acid?
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Bromination of pyridine in fuming sulphuric acid. When pyridine (4 moles) is heated at 130° in fuming sulphuric acid with bromine (1 mole), 1.6-1.8 moles of pure 3-bromopyridine are formed according to the equation 2 C5H5N + 2 SO3 + Br2 → 2 C5H4BrN + SO2 + H2SO4
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