Which of the following reagents would you expect to react with cinnamic acid under the conditions given below?
CH₃CH₂ and catalyst
Br₂(aq) at room temperature
CH₃OH and H₂SO₄ catalyst
A - VCE - SSCE Chemistry - Question 10 - 2009 - Paper 1
Question 10
Which of the following reagents would you expect to react with cinnamic acid under the conditions given below?
CH₃CH₂ and catalyst
Br₂(aq) at room temperature
CH₃... show full transcript
Worked Solution & Example Answer:Which of the following reagents would you expect to react with cinnamic acid under the conditions given below?
CH₃CH₂ and catalyst
Br₂(aq) at room temperature
CH₃OH and H₂SO₄ catalyst
A - VCE - SSCE Chemistry - Question 10 - 2009 - Paper 1
Step 1
CH₃CH₂ and catalyst
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Answer
The reaction of cinnamic acid with CH₃CH₂ (ethyl) and a catalyst is expected to take place. The catalyst typically aids in the reaction formation, and with the structure of cinnamic acid, electrophilic addition or other mechanisms can occur, confirming it should react with a 'Yes'.
Step 2
Br₂(aq) at room temperature
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Answer
Cinnamic acid will react with Br₂ in an aqueous solution at room temperature due to the presence of the alkene group in its structure. This leads to bromination occurring, which is a common reaction with such compounds. Hence, the answer is 'Yes'.
Step 3
CH₃OH and H₂SO₄ catalyst
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Answer
In the presence of CH₃OH and H₂SO₄, cinnamic acid can undergo esterification, which is a typical reaction facilitated by an acid catalyst. Therefore, this reaction is expected, resulting in a 'Yes'.
