Which has E-Z isomers?
A C_2H_2Br_2
B C_2H_2Br
C C_2H_2Br_2
D C_2H_2Br - AQA - A-Level Chemistry - Question 22 - 2020 - Paper 3
Question 22
Which has E-Z isomers?
A C_2H_2Br_2
B C_2H_2Br
C C_2H_2Br_2
D C_2H_2Br
Worked Solution & Example Answer:Which has E-Z isomers?
A C_2H_2Br_2
B C_2H_2Br
C C_2H_2Br_2
D C_2H_2Br - AQA - A-Level Chemistry - Question 22 - 2020 - Paper 3
Step 1
A C_2H_2Br_2
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Answer
The compound C_2H_2Br_2 can have E-Z isomerism due to the presence of two different substituents on each carbon atom. This allows for geometric isomerism.
Step 2
B C_2H_2Br
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Answer
The compound C_2H_2Br cannot exhibit E-Z isomerism because there are not two different groups bonded to each carbon atom.
Step 3
C C_2H_2Br_2
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Answer
Like in part A, C_2H_2Br_2 can have E-Z isomers due to the same reasoning of having two different substituents on each carbon.
Step 4
D C_2H_2Br
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Answer
Similar to part B, C_2H_2Br does not have E-Z isomers because it lacks the necessary different substituents to allow for geometric isomerism.
