Abstract
Nmr and UV studies show that p -dimethylamino- α -bromostyrene, I, undergoes S Nl reaction in H 2O and HClO 4 ( kS Nl = 6 × 10 −1sec. −1 at 25°). The vinyl cation has an extraordinary selectivity for capture by aromatic amines relative to H 2O, including I itself to give the dimer II.
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