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Question
Which of the following represents a trans form ?
Which of the following represents a trans form ?
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Solution
The correct option is A
For cycloalkene rings, when the number of carbon is less than 8 its trans form does not exist. Hence, no geometrical isomerism across the pi-bond is observed in 3-7 membered cycloalkenes. Hence, option (b) and (c) will not show geometrical isomerism.
Cycloalkenes with 8 or more carbons in a ring exhibit geometrical isomerism.
For cycloalkenes having ring size of 12 or more carbon atoms, trans-isomer is more stable than cis-isomer.
Hence, the correct answer is option (a).
For cycloalkene rings, when the number of carbon is less than 8 its trans form does not exist. Hence, no geometrical isomerism across the pi-bond is observed in 3-7 membered cycloalkenes. Hence, option (b) and (c) will not show geometrical isomerism.
Cycloalkenes with 8 or more carbons in a ring exhibit geometrical isomerism.
For cycloalkenes having ring size of 12 or more carbon atoms, trans-isomer is more stable than cis-isomer.
Hence, the correct answer is option (a).
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