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Which of the following will exhibits geometrical isomerism ?
  • a)
    1-Phenyl-2butene
  • b)
    3-Phenyl-1-butene
  • c)
    2-Phenyl-1-butene
  • d)
    1,1-Diphenyl-1-propene
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Which of the following will exhibits geometrical isomerism ?a)1-Phenyl...
Geometrical isomerism occurs in compounds that have restricted rotation around a double bond due to the presence of bulky substituents on either side of the double bond. The two possible isomers differ in their spatial arrangement, and they cannot be interconverted without breaking the double bond.

Explanation:

a) 1-Phenyl-2-butene has a phenyl group attached to one of the carbon atoms of the double bond, which prevents free rotation around the bond, making it a chiral compound that exhibits geometrical isomerism.

b) 3-Phenyl-1-butene has a phenyl group attached to the end of the carbon chain, which does not affect the rotation around the double bond, and therefore, it does not exhibit geometrical isomerism.

c) 2-Phenyl-1-butene has a phenyl group attached to one of the carbon atoms of the double bond, but it also has a methyl group on the same carbon, which allows free rotation around the bond, and therefore, it does not exhibit geometrical isomerism.

d) 1,1-Diphenyl-1-propene has two phenyl groups attached to the same carbon atom, which prevents free rotation around the double bond, making it a chiral compound that exhibits geometrical isomerism.

Therefore, the correct answer is option A, 1-Phenyl-2-butene, which exhibits geometrical isomerism due to the presence of a bulky phenyl group that restricts the rotation around the double bond.
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Which of the following will exhibits geometrical isomerism ?a)1-Phenyl-2buteneb)3-Phenyl-1-butenec)2-Phenyl-1-butened)1,1-Diphenyl-1-propeneCorrect answer is option 'A'. Can you explain this answer?
Question Description
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