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Chapter 16: Q25P (page 759)

Question:What reducing agents should be used to obtain the desired target molecules?

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01

Catalytic hydrogenation

The catalytic hydrogenation in presence of palladium and carbon can reduce the carbon-carbon double bond only.

  • But-2-en-al can be converted into butanal by catalytic hydrogenation in presence of palladium-Carbon.

The catalytic hydrogenation in presence of Raney Nickel can reduce both the carbon-carbon double bond and carbon-oxygen double bond of the carbonyl group.

  • But-2-en-al can be converted into butanol by catalytic hydrogenation in the presence of Raney Nickel.

The reagents used are as follows:

Reagents used

02

Reduction by sodium borohydride

Sodium borohydride can reduce only the carbonyl group.

But-2-en-al can be converted into but-2-en-ol by reduction in the presence of sodium borohydride.

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Most popular questions from this chapter

A compound reacts with methylmagnesium bromide followed by acidification to form the product with the followingH1NMR spectrum. Identify the compound.

Propose a mechanism for each of the following reactions:

In the mechanism of cyanohydrin formation, why isHCN the only acid that protonates the alkoxide ion instead of HCI?

Question:Can a cyanohydrin be prepared by treating a ketone with sodium cyanide?

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