Question

Which of the following isomerism is not shown by alkynes?

• A. Tautomerism
• B. Geometrical
• C. Conformational
• D. None of these

Answer 1

Answer: (A), (B), (C)

The correct options are
A

Tautomerism

B

Geometrical

C

Conformational

Alkynes will not shown Tautomerism and conformational isomerism.

$\to$ Tautomerism generally arises due to migration of a proton from one polyvalent atom to the other within the same molecule with necessary rearrangement of linkages.

It will not be possible for alkynes.

$\to$ Alkynes cannot rotate because of presence of $\pi$-bonds.

Also, geometrical isomerism is not possible for a pure alkyne-only compound.