Isomerism and Stereochemistry - Case Studies
Q. What is the correct IUPAC name for the compound CH3-CH(CH3)-CH2-CH3?
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A.
2-methylbutane
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B.
3-methylbutane
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C.
2-pentanol
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D.
3-pentanol
Solution
The longest chain has four carbons, and there is a methyl group on the second carbon, making it 2-methylbutane.
Correct Answer: A — 2-methylbutane
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Q. Which of the following compounds is a meso compound?
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A.
2,3-butanediol
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B.
2-butanol
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C.
3-pentanol
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D.
1,2-dichloropropane
Solution
2,3-butanediol has two chiral centers but is superimposable on its mirror image, making it a meso compound.
Correct Answer: A — 2,3-butanediol
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Q. Which of the following compounds is an example of a meso compound?
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A.
2,3-butanediol
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B.
1,2-dichloropropane
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C.
2-pentene
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D.
3-hexanol
Solution
2,3-butanediol has two chiral centers but is superimposable on its mirror image, making it a meso compound.
Correct Answer: A — 2,3-butanediol
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Q. Which of the following is a chiral molecule?
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A.
2-butanol
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B.
1-butanol
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C.
butane
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D.
propene
Solution
2-butanol has a chiral center at the second carbon, making it chiral.
Correct Answer: A — 2-butanol
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