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Multiple Choice
Which of the following molecules is an example of a chiral compound?
A
Benzene
B
Ethane
C
2-Butanol
D
2-Propanol
Verified step by step guidance
1
Understand the concept of chirality: A chiral molecule is one that cannot be superimposed on its mirror image. This often involves a carbon atom bonded to four different groups.
Examine the structure of benzene: Benzene is a symmetrical ring structure with alternating double bonds, making it achiral as it can be superimposed on its mirror image.
Analyze ethane: Ethane is a simple alkane with two carbon atoms bonded to hydrogen atoms. It is achiral because it lacks a carbon atom bonded to four different groups.
Consider 2-butanol: 2-butanol has a chiral center at the second carbon, which is bonded to four different groups: a hydroxyl group (OH), a methyl group (CH₃), an ethyl group (C₂H₅), and a hydrogen atom (H). This makes it chiral.
Evaluate 2-propanol: 2-propanol has a hydroxyl group attached to the second carbon, but this carbon is bonded to two identical methyl groups, making it achiral as it can be superimposed on its mirror image.