3 All of the following must have an optical rotation of 0 ex

3. All of the following must have an optical rotation of 0° except a) a solution of a compound with no chiral carbons b) a solution of a meso compound c) a solution of a pair of diastereomers Explaun ansuveV a solution of a pair of enantiomers

Solution

a. Compound do not have no chiral centres. Therefore optical rotation 0.

b. A meso compound is optically inactive becuase internal plane of symmetry.

C. diastereomers having different optical rotations. Therefore mixture of diastereomers rotations cannot be zero. Therefore mixture of diastereomers solution is except to zero.

d. a pair of enantiomers will have optial rotation zero.

Therefore the answer is C.