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The reation of RCONH(2) with a mixture o...

The reation of `RCONH_(2)` with a mixture of `Br_(2)` and aqueous `KOH` gives `RNH_(2)` as the main product The intermediate (s) involved in this reation is (are) .

A

`RCONHBr`

B

`RCONbarNBrK^(+)`

C

`R-N=C=O`

D

all of these

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The correct Answer is:
D
A nitrene is a neutral molecule with an electron-deficient `N` It is structuraly similar to a carbene Nitrenes rearrange rapidly to isocyanates which react further as shown Note that the amine has one less `C` than the amide and its precursor carboxylic acid

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