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. 2-methylbutan-1-ol and 2-methylbutan-2-ol cannot be formed directly by alkaline hydrolysis of esters; this process typically produces carboxylic acids and alcohols that do not necessarily correspond to 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 incorrect. While alcohols can be oxidized, 2-methylbutan-2-ol, a tertiary alcohol, cannot be oxidized using potassium dichromate(VI), as it requires a primary or secondary alcohol for successful oxidation.
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 be synthesized through the hydration of 2-methylbut-2-ene, as the process can yield both corresponding alcohols depending on the conditions.
Step 4
D They have four peaks in their 13C NMR spectra.
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Answer
This statement is incorrect. The structures of 2-methylbutan-1-ol and 2-methylbutan-2-ol will result in different peaks in their 13C NMR spectra, typically indicating more than four distinct carbon environments.
