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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Shweta Thakur posted an Question
April 22, 2020 • 20:35 pm
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30 points
30 points
- IIT JAM
- Chemistry (CY)
Sir plz tell the mechanism for this also although i know mechanism of formation of diazotization but after the formation of this i am getting how fluroben. form
Cnior1de Fluoroarenes (aryl fluorides) are prepared by heating the corresponding diazonium tetrafluoroborates ch. in turn, are obtained by the diazotisation of a suitable aromatic primary amine with aq. NaNO, in sence of fluoroboric acid (HBF) at 273-278 K. NH2 N = NBF4 F NaNO,/HBF4 A O +N+ BF3 273-278 K Boron trifluoride Fluorobenzene Benzenediazonium tetrafluoroborate Aniline This reaction is called Balz-Schiemann reaction.
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Dinesh khalmaniya 1 Best Answer
Balz Schiemann Reaction Mechanism Step 1: Formation of Nitrosyl cation by the dehydration of nitrous acid. Step 2: Aryl amine exposed to nitrosyl cation. After undergoing dehydration and its tautomerization, the aryl amine yields the aryl diazonium salt. Step 3: Addition of fluoroboric acid to the aryl diazonium salt and the subsequent addition of energy finally gives aryl fluoride via a diazonium tetrafluoroborate intermediate stage. The step by step process of Balz Schiemann Reaction mechanism is illustrated below:
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