Understanding Structural Isomers in Chemistry

13 Jul 2021

Which of the following statements correctly describe a pair of structural isomers? Structural isomers, or constitutional isomers, are different compounds with the same molecular formula but different connectivity of atoms. They are distinct in their physical and chemical properties. The proposition that structural isomers differ by one CH₂ group or have different molecular formulas is false. Option D is the correct explanation.

Understanding Structural Isomers

In chemistry, structural isomers, also known as constitutional isomers, are compounds that have the same molecular formula but differ in how the atoms are connected to each other. This means they are different compounds in terms of their physical and chemical properties due to the variation in their structure.

Key Characteristics of Structural Isomers

1. Different Connectivity: Structural isomers have unique arrangements of atoms, which results in distinct chemical and physical properties.

2. Same Molecular Formula: Despite having different structures, structural isomers share the same molecular formula.

3. Distinct Properties: Due to their varying structures, structural isomers exhibit different behaviors in reactions and properties.

Correct Statements about Structural Isomers

1. Structural isomers differ in the way their atoms are connected to each other.

2. Structural isomers are different compounds.

3. Structural isomers are also called constitutional isomers.

It is important to note that the statement claiming structural isomers have different molecular formulas is incorrect, as these compounds share the same composition but differ in structural arrangement.

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