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. Alkaline hydrolysis of esters typically produces carboxylic acids and alcohols, but it does not directly yield both 2-methylbutan-1-ol and 2-methylbutan-2-ol.
Step 2
B They can be oxidised by reaction with acidified potassium dichromate(VI).
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Answer
This statement is incorrect for 2-methylbutan-2-ol, as it is a tertiary alcohol and does not get oxidised by potassium dichromate(VI) under standard conditions.
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 through the hydration of 2-methylbut-2-ene, using either acid-catalyzed hydration or hydroboration-oxidation.
Step 4
D They have four peaks in their 13C NMR spectra.
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Answer
This statement is incorrect. The 13C NMR spectra for 2-methylbutan-1-ol and 2-methylbutan-2-ol will show more than four peaks due to the different environments of the carbon atoms in each molecule.
