Chemistry - STEREO ISOMERISM Question with Solution | TestHub
Identify the following structures as achiral or chiral:
Achiral structures:
(a) 
(b) 
(c) 
(d) 
(e) 
(f) 
(g) 
(h)
Chiral structures:
(i) 
(j) 
(k) 
(l) 
(m) 
(n) 
Options:
Answer:
Solution:
Structures (a)-(h) each possess a plane or centre of symmetry and are achiral. Structures (i)-(n) are nonsuperimposable on their mirror images and are chiral.
These conformations are nonsuperimposable mirror images, and they do not interconvert. They are enantiomers, and they can be separated and isolated. Each of them is optically active, and they have equal and opposite specific rotations.
mirror 
Enantiomers of penta-2,3-diene: the two CH3 and H groups at the two ends of the cumulated double bond lie in perpendicular planes, so the molecule has no plane of symmetry and exists as a pair of enantiomers.
