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Question

Which of the following polyene is the least stable?

A
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B
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C
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D
All of them have equal stability.
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Solution

The correct option is C
Stability of polyenes
Conjugated>Isolated>Cumulative
(a) is an example of isolated polyene
(b) is an example of conjugated polyene
(c) is an example of cumulative polyene

Isolated polyenes: Compound in which multiple bonds separated by two or more single bond.

Cumulated polyenes : Double bonds sharing a common atom.
Conjugated polyenes : Alternate single and double bonds.


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