Question

If optical rotation produced by the compound [A] is $+{65}^0$, then produced by the compound [B] is?

• A. $+{65}^0$
• B. $-{65}^0$
• C. Zero
• D. Unpredictable

Answer 1

Answer: (C)

Zero

It is symetry along 2-3 bond. So it has plane of symetry which makes it optically inactive.

So, optical rotation = zero.