why HF is not react with diazo of aniline ?
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Diazotization of aniline with NaNO
2
/ HCl at 273-278K gives benzene diazonium chloride. Balz-Schiemann reaction then replaces diazo group with −F by treatment with HB
4
to obtain fluorobenzene. F atom is then replaced with nitro group by heating with NaNO
2
. Reduction with Sn/HCl converts nitrobenzene to aniline.
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