How many structural isomers are possible for C4H9CI ?

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Answer (Detailed Solution Below)

Option 3 : 4
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Concept:

  • Structural Isomers: Compounds with the same molecular formula but different structural arrangements of atoms.

  • Types of Isomerism:

    • Structural (Constitutional) Isomerism: Atoms are connected differently, leading to different structures. Includes chain, position, and functional group isomerism.

    • Stereoisomerism: Atoms are connected in the same way but differ in spatial arrangement. Includes geometric (cis-trans) and optical isomerism.

    • Ionisation Isomerism: In coordination compounds, involves the exchange of ligands and counter ions. 

Explanation:

  • Chain 1: Butane (straight chain):

    • 1-Chlorobutane

    • 2-Chlorobutane

  • Chain 2: 2-Methylpropane (branched chain):

    • 1-Chloro-2-methylpropane

    • 2-Chloro-2-methylpropane

This gives us a total of 4 structural isomers for the molecular formula C4H9Cl.

Conclusion:

The number of structural isomers possible for C4H9Cl is: 4

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