To identify geometrical isomerism, understand its definition. Geometrical isomerism, also known as cis-trans isomerism, is a type of stereoisomerism found in alkenes and similar compounds. It arises from different spatial arrangements of atoms or groups around a double bond.
For geometrical isomerism to occur, two conditions are necessary:
A double bond must be present, preventing free rotation.
Each carbon atom involved in the double bond must be bonded to two distinct groups or atoms.
Analysis of the provided options:
- Requires direct verification of conditions.
- Requires direct verification of conditions.
- Depicts a compound with a double bond where each carbon has two different groups, thus exhibiting geometrical isomerism.
- Requires direct verification of conditions.
Option 3 (Fig 3) meets the criteria for geometrical isomerism due to the presence of different groups on the carbons of the double bond, enabling cis-trans isomers.
