Which one of the following exhibits geometric | vedclass

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Question

(A) For a molecule to exhibit geometrical isomerism,each carbon atom of the double bond must be attached to two different groups. In $CH_3-CH=CH-CH_3$

Vedclass · Accepted Answer

$CH_3-CH=CH-CH_3$ (But$-2-$ene)

Vedclass · Answer

(A) For a molecule to exhibit geometrical isomerism,each carbon atom of the double bond must be attached to two different groups. In $CH_3-CH=CH-CH_3$ (But$-2-$ene),the first carbon is attached to $-H$ and $-CH_3$,and the second carbon is also attached to $-H$ and $-CH_3$. Since both carbons have different substituents,it exhibits $cis$- and $trans$-isomerism. In the other options,at least one carbon of the double bond is attached to two identical groups (e.g.,two $-H$ atoms),which prevents geometrical isomerism.

Which one of the following exhibits geometrical isomerism?

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