Chemistry - STEREO ISOMERISM Question with Solution | TestHub
Number of optically inactive compounds from above compounds is/are :
Answer:
Solution:
An organic compound is optically inactive if it possesses a Plane of Symmetry (POS) or a Center of Symmetry (COS).
Compounds (ii) and (iii) possess a Plane of Symmetry (POS) bisecting the molecule through the C–Br bond, reflecting the two cis-Cl atoms into each other.
Compound (iv) possesses a Center of Symmetry (COS) because identical groups (Cl and Br) are diagonally opposite with inverted stereochemistry (wedge to dash).
Compounds (v) and (vi) possess a diagonal Plane of Symmetry (POS) passing through one pair of identical trans-groups, reflecting the other two identical groups into each other.
Compounds (i), (vii), and (viii) lack any symmetry element, making them asymmetric and optically active.
