Molecules whose mirror image is non-superimposable over them are known as chiral. Which of the following molecules is chiral in nature?

Options

A. 2-bromobutane
B. 1-bromobutane
C. 2-bromopropane
D. 2-bromopropan-2-ol

Answer

A

Explanation

Chiral/asymmetric carbon is that carbon in which carbon has formed four bonds with four different groups. Let see the structural formula of the given compounds
`H_3overset(1)(C)-overset(*" "2)underset("(2-bromobutane)")underset(Br)underset(|)(CH)-overset(3)(CH_2)-overset(4)(CH_3)`
`overset(4)CH_3-overset(2)CH_2-overset(2)CH_2-overset(1)CH_2Br = 2 bromobutane(i)`
`overset(1)CH_3-underset(Br)underset(|)overset(2)CH-overset(3)CH_3` = 2 bromopropane
`overset(3)CH_3-overset(Br)overset(|)overset(2)underset(OH)underset(|)(C)-overset(1)CH_3`= 2 bromopropane 2-ol
With the help of these structural formulae it is very clear that 2-bromobutane in which asterisk mark carbon atom is bonded to four different atoms or groups. So, this molecule is chiral in nature. Other molecules do not contains four different atoms or groups.