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Question

RCNreagent−−−RCHO, reagent can be:

A
SnCl2/HCl/H2O
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B
DIBALH, H+/H2O
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C
PdBaSO4/ boiling xylene
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D
Both 1 and 2
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Solution

The correct option is D Both 1 and 2
a) This is Stephen's reaction, which involves the conversion of an alkyl cyanide to an aldehyde using SnCl2/HCl as a reducing agent.
b) DIBALH, also reduces the nitrile group to an aldehyde.
c) PdBaSO4 will not reduce alkyl cyanide into aldehyde.

RCNSnCl2/HCl−−−−−−RCHO
RCNDIBALH, H+/H2O−−−−−−−−−−−−−RCHO

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