Question

Optically active dimethylcyclobutane is:

• A. cis$-1,2-$ dimethyl cyclobutane
• B. trans$-1,2-$ dimethyl cyclobutane
• C. cis$-1,3-$ dimethyl cyclobutane
• D. trans$-1,3-$ dimethyl cyclobutane

Answer 1

The correct option is B trans$-1,2-$ dimethyl cyclobutane

1,2 dimethyl cyclobutane. Optically active (chiral).

1,3 dimethyl cyclobutane has no chirality not optically active.

cis 1,2 dimethyl cyclo Butane forms a superposable mirror image.

So optically inactive.

trans 1,2 dimethyl cyclo Butane forms non-superposable mirror images.

So optically active.