Chemistry - STEREO ISOMERISM Question with Solution | TestHub
Identify total number of compounds which are optically active?
Answer:
Solution:
Compound (1): Optically active because it contains a chiral carbon attached to four different groups (–H, –OH, –CH₃, –CH₂CH₃).
Compound (2): Optically active as it is an allene system with an even number of cumulative double bonds and distinct terminal groups.
Compound (4): Optically active because it is a spiro compound with an even number of rings and different substituents at both terminals.
Compound (6): Optically active because trans-1,3-dichlorocyclopentane lacks both a plane of symmetry (POS) and a center of symmetry (COS).
Compounds (3), (5), and (7): Optically inactive because they all possess a plane of symmetry (POS) that bisects the molecule.
Total number of optically active compounds = 4 (Compounds 1, 2, 4, and 6)
