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What is the minimum number of C atoms re...

What is the minimum number of C atoms required to have a carbon-corbon triple bond in a cyclic structure?

A

Eight

B

Seven

C

Six

D

Five

Text Solution

Verified by Experts

The correct Answer is:
A
The linear structural unit `-C-C-=C-C-` can be bridged with a least four C's, hence, eight-membered ring is the smallest-sized ring that can accommodate a triple bond. Thus cyclopentyne, cyclohexyne, and cycloheptyne do not axist. Cyclooctyne is the simplest cycloalkyne.
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