Question

Which of the following compounds is not chiral ?

• A. $ 1 $ -chloro- $ 2 $ -methyl pentane
• B. $ 2 $ -chloropentane
• C. $ 1 $ -chloropentane
• D. $ 3 $ -chloro- $ 2 $ -methyl pentane

Answer 1

Answer: (C)

To be optically active, compound or structure should possess a chiral or asymmetric carbon atom.

1- chloropentane

2- chloropentane

1-chloro-2-methyl pentane

3-chloro-2-methyl pentane
$\left(C^{*}=\right.$ asymmetric C-atom)
Hence, 1-chloropentane is not chiral.