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Which of the following alkenes will reac...

Which of the following alkenes will react faster with `H_(2)` under catalytic hydrogenation conditions?

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
a
Heat of hydrogenation of alkene
`prop (1)/("Stability of alkene")`
Hence the lakene which will react fastest with `H_(2)` will be the least stable. Among the given options the compound having lwast number of alkyl groups `(R)` will be the least stable.
Further the relative rates of hydrogenation decrease with increase of steric hindrance
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