Question

Which of the following is an example of cumulated polyene?

• A.
• B.
• C.
• D.

Answer 1

The correct option is C

Cumulated polyenes :
Double bonds sharing a common atom.
In option (b) , two double bonds sharing a common carbon atom, therefore it is correct.

Conjugated polyenes :

Alternate single and double bonds. So, option a,b,d are the examples of conjugated polyenes.