PORTAGE LEARNING EXAM vc vc
Exam Solutionvc
Chapter 21 Reagents Cartes 2026 A+ GRADE ASSURED C vc vc vc vc vc vc vc vc
OMPLETE SOLUTIONS AND VERIFIED ANSWERS (E2B61 vc vc vc vc vc
)
QUESTION 1 vc
[H30+], Br2 vc
ANSWER
Alpha-
Bromination Can be used to install a bromine at the T position of a ketone or aldehyde. Subsequent trea
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tment of resulting alpha-bromoketone with pyridine gives beta-unsaturated ketone. This two-
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step process can be used to introduce a beta-unsaturated into a ketone or aldehyde.
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QUESTION 2 vc
1. Br2, PBR3 2. H20
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ANSWER
Hell-Volhard-
Zelinsky Reaction These reagents can be used to install a bromine atom at the alpha position of a carboc
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yclic acid.
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QUESTION 3 vc
1) NaOH, Br2 2) H3O+
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ANSWER
Haloform Reaction These reagents can be used to convert a methyl ketone into a carboxylic acid. This pr
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ocess is most efficient when the other alpha position (of the staring ketone) bears no protons
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QUESTION 4 vc
NaOH, H20 vc
Exam Solutionvc
Chapter 21 Reagents Cartes 2026 A+ GRADE ASSURED C vc vc vc vc vc vc vc vc
OMPLETE SOLUTIONS AND VERIFIED ANSWERS (E2B61 vc vc vc vc vc
)
QUESTION 1 vc
[H30+], Br2 vc
ANSWER
Alpha-
Bromination Can be used to install a bromine at the T position of a ketone or aldehyde. Subsequent trea
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tment of resulting alpha-bromoketone with pyridine gives beta-unsaturated ketone. This two-
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step process can be used to introduce a beta-unsaturated into a ketone or aldehyde.
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QUESTION 2 vc
1. Br2, PBR3 2. H20
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ANSWER
Hell-Volhard-
Zelinsky Reaction These reagents can be used to install a bromine atom at the alpha position of a carboc
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yclic acid.
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QUESTION 3 vc
1) NaOH, Br2 2) H3O+
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ANSWER
Haloform Reaction These reagents can be used to convert a methyl ketone into a carboxylic acid. This pr
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ocess is most efficient when the other alpha position (of the staring ketone) bears no protons
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QUESTION 4 vc
NaOH, H20 vc