Question

Which of the following compounds is a cyclic allyl?

• A. Cyclohexene
• B. Cyclopropene
• C. 1,3-Cyclohexadiene
• D. Cycloheptatriene

Hint:

Cyclic allyl compounds have a conjugated system of alternating single and double bonds in a ring, which is a defining characteristic for compounds like cycloheptatriene.

Answer 1

The Correct Option is D

A cyclic allyl is a compound that contains a cyclic structure with a conjugated system of double bonds, where the conjugation involves an allyl group (a structure with a C=C single bond adjacent to another C=C).
- Cyclohexene is an alkene, but it is not a cyclic allyl. - Cyclopropene is a three-membered ring with one double bond, but it does not form a cyclic allyl.
- 1,3-Cyclohexadiene is a diene, but it is not classified as a cyclic allyl.
- Cycloheptatriene, on the other hand, is a cyclic compound with alternating single and double bonds, fitting the description of a cyclic allyl and is also known as the precursor to the aromatic compound benzene in some reactions. Therefore, the correct answer is option (D).