Question

Which of the following is true for conformational isomerism?

• A. It is exhibited by the isomers that can be inter converted through rotations about formally single bonds.
• B. Rotations are possible about double bonds also.
• C. Rotations are possible about tirple bonds also
• D. None of these.

Answer 1

The correct option is A

It is exhibited by the isomers that can be inter converted through rotations about formally single bonds.

What do we know about conformational isomerism?

It is exhibited by the isomers that can be interconverted through rotations about formally single bonds. These isomers can rotate about one or more σ-bonds; see chapter 6 for more detail.

The infinite number of momentary arrangements of the atoms in space which result through rotation about single bonds are called conformations or rotational isomers or conformers or constellations or simply rotamers.

Therefore, only option (A) is correct.