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. 2018 May 10;13(5):e0196797. doi: 10.1371/journal.pone.0196797

Fig 6. HPLC traces of the halogenation of indole with BalH in excess of NaCl (100 mM) and three different concentrations of NaBr (0 mM, 10 mM, 100 mM).

Fig 6

Even in 10 times higher concentrations of chloride over bromide, bromide is the preferred halide source (HPLC method A).