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Multiple Choice
Which of the following molecules is an example of a chiral compound?
A
2-Propanol
B
Ethane
C
Benzene
D
2-Butanol
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 usually occurs when a carbon atom is bonded to four different substituents, creating a stereocenter.
Examine the structure of 2-Propanol: The molecule has the formula \( \text{CH}_3\text{CHOHCH}_3 \). The central carbon is bonded to a hydroxyl group (OH), a hydrogen atom (H), and two methyl groups (CH3), making it achiral as it lacks four different substituents.
Analyze the structure of Ethane: The molecule has the formula \( \text{C}_2\text{H}_6 \). Each carbon is bonded to three hydrogen atoms and one other carbon atom, resulting in no stereocenters and thus, it is achiral.
Consider the structure of Benzene: The molecule has the formula \( \text{C}_6\text{H}_6 \) and consists of a planar ring with alternating double bonds. All carbon atoms are equivalent and bonded to hydrogen atoms, making it achiral.
Evaluate 2-Butanol: The molecule has the formula \( \text{CH}_3\text{CH}_2\text{CHOHCH}_3 \). The central carbon is bonded to a hydroxyl group (OH), a hydrogen atom (H), an ethyl group (CH2CH3), and a methyl group (CH3), creating a stereocenter and making it chiral.