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  4. Which of the following compounds will exhibit geometrical isomerism?

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Q. Which of the following compounds will exhibit geometrical isomerism?

UPSEEUPSEE 2017Organic Chemistry – Some Basic Principles and Techniques

Solution:

Only compound 1-phenyl-2-butene can show geometrical isomerism.

(a) 3-phenyl-1-butene

image

(No geometrical isomerism)

(b) 2-phenyl-1-butene

image

(No geometrical isomerism)

(c) 1,1, diphenyl-1-propene

image

(No geometrical isomerism)

(d) 1-phenyl-2-butene :

$C \overset{4}{H}_{3}-H\overset{3}{C}= \overset{1}{C}H-C\overset{1}{H_{2}}-ph$

The correct possible answer is (d) but due printing mistake. No answer is correct.