Hofmann rearrangement In the Hoffmann rearrangement an unsubstituted amide is treated with sodium hydroxide and bromine to give a primary amine that has one carbon lesser than starting amide. R-oversetoverset(O)(||)C-NH_2+NaOH+Br_2toR-N=underset("isocyanate")(C=O)overset("hydrolysis")toR-NH_2 Mech : If the migrating group is chiral then its configuration is retained . Electron releasing effects in the migrating group increases reactivity of Hofmann rearrangement. Which of the following compound cannot give Hofmann rearrangement :

Hofmann rearrangement In the Hoffmann rearrangement an unsubstituted

1.	Hofmann rearrangement In the Hoffmann rearrangement an unsubstituted amide is treated with sodium hydroxide and bromine to give a primary amine that has one carbon lesser than starting amide. R-oversetoverset(O)(\|\|)C-NH_2+NaOH+Br_2toR-N=underset("isocyanate")(C=O)overset("hydrolysis")toR-NH_2 Mech : If the migrating group is chiral then its configuration is retained . Electron releasing effects in the migrating group increases reactivity of Hofmann rearrangement. Which of the following compound cannot give Hofmann rearrangement :
Answer» `CH_3-CH_2-oversetoverset(O)(\|\|)C-NH-Ph` `Ph-oversetoverset(O)(\|\|)C-NH_2` Solution :Only PRIMARY AMIDE gives Hofmann REARRANGEMENT