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Hyperconjugation

Choose the co...

Question

Choose the correct stability order of the given alkenes.

A

I > I I > I I I

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B

I = I I = I I I

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C

I I I > I I > I

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D

I I > I = I I I

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Solution

The correct option is C $I I I > I I > I$
The stability of alkenes is based on the number of $α$ -hydrogens of the given alkene . More the number of $α$ -hydrogens, more is the stability due to hyperconjugation.

I has 1 $α$ -hydrogen.
II has 4 $α$ -hydrogens.
III has 8 $α$ -hydrogens.
So, the correct order is
$I I I > I I > I$

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Hyperconjugation

Standard XII Chemistry

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