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Multiple Choice
Which of the following methods can be used to determine if a compound is chiral?
A
Check for a plane of symmetry in the molecule.
B
Check if the compound can form hydrogen bonds.
C
Identify if the compound has an even number of carbon atoms.
D
Determine if the compound rotates plane-polarized light.
Verified step by step guidance
1
Understand the concept of chirality: A chiral molecule is one that is not superimposable on its mirror image. This often involves a carbon atom bonded to four different groups, known as a chiral center.
Recognize that chirality is related to optical activity: Chiral compounds have the ability to rotate plane-polarized light. This property is used to determine if a compound is chiral.
Evaluate the given methods: Checking for a plane of symmetry is a valid method because a chiral molecule should not have a plane of symmetry. However, the presence of a plane of symmetry indicates achirality.
Consider the other methods: The ability to form hydrogen bonds or having an even number of carbon atoms are not directly related to chirality. These properties do not determine if a compound is chiral.
Conclude with the correct method: The most definitive way to determine if a compound is chiral is to test if it rotates plane-polarized light, as this is a direct consequence of chirality.