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.