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Identify the chiral molecule from the following.

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Questions

Identify the chiral molecule from the following.

Which of the following is an example of chiral molecule?

Options

  • 1-Bromobutane

  • 1,1-Dibromobutane

  • 2,3-Dibromobutane

  • 2-Bromobutane

MCQ
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Solution

2,3-Dibromobutane and 2-Bromobutane

Explanation:

At first, we need to make the structure of all compounds to say which is chiral or not.

(a) 

\[\begin{array}{cc}
\phantom{........}\ce{H}\\
\phantom{........}|\\
\ce{C - C - C - C - Br}\\
\phantom{........}|\\
\phantom{........}\ce{H}
\end{array}\]

(b)

\[\begin{array}{cc}
\phantom{.........}\ce{Br}\\
\phantom{........}|\\
\ce{C - C - C - C - Br}\\
\phantom{........}|\\
\phantom{........}\ce{H}
\end{array}\]

(c)

\[\begin{array}{cc}
\phantom{..}\ce{Br}\phantom{..}\ce{Br}\phantom{}\\
\phantom{}|\phantom{....}|\phantom{}\\
\ce{C - C - C - C}
\end{array}\]

(d)

\[\begin{array}{cc}
\phantom{......}\ce{Br}\\
\phantom{.....}|\\
\ce{C - C - C - C}\\
\phantom{.....}|\\
\phantom{.....}\ce{H}
\end{array}\]

Now, we can see that 2,3-Dibromobutane and 2-Bromobutane has a Chiral carbon (that carbon which has 4 different attachments).

Hence, It's a chiral molecule.

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Chapter 10: Halogen Derivatives - Exercises [Page 231]

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Balbharati Chemistry [English] Standard 12 Maharashtra State Board
Chapter 10 Halogen Derivatives
Exercises | Q 1. v. | Page 231

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