JEE Main · 2005 · 08 May 2005 · Offline · General Organic Chemistry

Which types of isomerism is shown by 2,3-dichlorobutane?

(A)Diastereo
(B)Optical✓ Correct
(C)Geometric
(D)Structural

Answer: (B)

Solution

2,3-Dichlorobutane has two carbons,

C X_{2}

and

C X_{3}

, each bearing four different groups, a chlorine, a hydrogen, a methyl and the rest of the chain, which makes each of them a stereocentre. A molecule with such asymmetric carbons is chiral and shows optical isomerism, appearing as a pair of enantiomers together with a meso form. The isomerism it displays is therefore optical.

JEE Main · 2005 · 08 May 2005 · Offline · Single correct option

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