Which statement is correct about both 2-methylbutan-1-ol and 2-methylbutan-2-ol?
A They can be formed by alkaline hydrolysis of esters - AQA - A-Level Chemistry - Question 11 - 2018 - Paper 3
Question 11
Which statement is correct about both 2-methylbutan-1-ol and 2-methylbutan-2-ol?
A They can be formed by alkaline hydrolysis of esters.
B They can be oxidised by... show full transcript
Worked Solution & Example Answer:Which statement is correct about both 2-methylbutan-1-ol and 2-methylbutan-2-ol?
A They can be formed by alkaline hydrolysis of esters - AQA - A-Level Chemistry - Question 11 - 2018 - Paper 3
Step 1
A They can be formed by alkaline hydrolysis of esters.
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Answer
This statement is incorrect. While 2-methylbutan-1-ol and 2-methylbutan-2-ol can be formed through various methods, alkaline hydrolysis of esters typically involves the formation of carboxylic acids and alcohols rather than these specific alcohols.
Step 2
B They can be oxidised by reaction with acidified potassium dichromate(VI).
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Answer
This statement is partially correct, but only 2-methylbutan-1-ol can be oxidized under these conditions to form a ketone, while 2-methylbutan-2-ol is a tertiary alcohol and does not undergo oxidation to another compound with potassium dichromate.
Step 3
C They can be formed by hydration of 2-methylbut-2-ene.
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Answer
This statement is correct. Both 2-methylbutan-1-ol and 2-methylbutan-2-ol can indeed be produced by the hydration of 2-methylbut-2-ene through Markovnikov's rule.
Step 4
D They have four peaks in their 13C NMR spectra.
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Answer
This statement is also correct. Both alcohols will exhibit four distinct peaks in their 13C NMR spectra due to their different carbon environments.
