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Hyperconjugation

Which of the ...

Question

Which of the following alkenes is the most stable on account of maximum hyperconjugation?

(C H_{3})_{3} C C H = C H_{2}

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C H_{3} C H = C H_{2}

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(C H_{3})_{2} C H C H = C H_{2}

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C H_{4} C H_{2} C H = C H_{2}

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Solution

The correct option is A $C H_{3} C H = C H_{2}$
More the number of Hydrogen atoms attached to alpha carbon more are the Hyperconjugating structures.
In prop-1-ene The alpha Hydrogens are 3 which are maximum among the given compounds and hence, it is the most stable.

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