Which will exhibit geometrical isomerism here? (a) A2 C=CAB (b) A2 C=CB2 (c) ABC=CAB (d) ABC=CX2

Name: Problem 58, Chapter 23: A Complete Resource Book in Chemistry for JEE Main
Uploaded: 2021-09-10T00:17:45-08:00
Duration: 3 min
Channel: Ishu Khandelwal
Description: Which will exhibit geometrical isomerism here? (a) A2 C=CAB (b) A2 C=CB2 (c) ABC=CAB (d) ABC=CX2

step 1 Hello, good evening students, so let's see the solution. So for GI geometrical isomerism to exis

Which will exhibit geometrical isomerism here? (a) A2 C=CAB...

Which will exhibit geometrical isomerism here?
(a) $\mathrm{A}_{2} \mathrm{C}=\mathrm{CAB}$
(b) $\mathrm{A}_{2} \mathrm{C}=\mathrm{CB}_{2}$
(c) $\mathrm{ABC}=\mathrm{CAB}$
(d) $\mathrm{ABC}=\mathrm{CX}_{2}$

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Key Concepts

Geometrical Isomerism

Geometrical isomerism is a form of stereoisomerism where compounds with the same structural formula differ in the spatial arrangement of substituents around a double bond or a ring. This phenomenon is commonly observed in alkenes due to the rigidity of the carbon-carbon double bond, which prevents free rotation. The distinct isomers, often referred to as cis and trans or E and Z, have different physical and chemical properties despite having the same molecular formula.

Substituent Differences

For a compound to exhibit geometrical isomerism at a double bond, each carbon of the double bond must have two different substituents. This difference is essential because if one of the carbons has two identical groups, the possibility for distinct spatial arrangements is eliminated. The requirement of varied substituents ensures that two distinct stereochemical configurations can exist, leading to the formation of isomers with different spatial orientations.

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