Introduction:
C3H7Cl is a chemical formula for a compound containing three carbon atoms, seven hydrogen atoms, and one chlorine atom. Structural isomers are compounds that have the same molecular formula but different structural arrangements of atoms. In this article, we will discuss how many structural isomers are possible in C3H7Cl and explain in detail.

Explanation:
To determine the total number of structural isomers possible in C3H7Cl, we need to consider all possible arrangements of atoms. We can start by drawing all possible structures and then counting them. However, this can be a time-consuming process. There is a simpler method to determine the number of structural isomers, which is called the chain isomerism.

Chain Isomerism:
Chain isomerism occurs when the carbon chain of the molecule is arranged differently. In C3H7Cl, there are three carbon atoms, and they can be arranged in a straight chain or branched chain.

Straight-Chain Isomers:
In a straight chain, all carbon atoms are connected in a linear fashion. There are two possible straight-chain isomers of C3H7Cl.

1. Propan-1-ol: In this isomer, the chlorine atom is attached to the first carbon atom in the chain.

CH3-CH2-CH2-Cl

2. Propan-2-ol: In this isomer, the chlorine atom is attached to the second carbon atom in the chain.

CH3-CHCl-CH3

Branched-Chain Isomers:
In a branched chain, one or more carbon atoms are attached to the main chain. There are five possible branched-chain isomers of C3H7Cl.

1. 1-Chloropropane: In this isomer, the chlorine atom is attached to the first carbon atom of the main chain, and one methyl group is attached to the second carbon atom.

CH3-CH2-CH2-Cl

2. 2-Chloropropane: In this isomer, the chlorine atom is attached to the second carbon atom of the main chain, and one methyl group is attached to the first carbon atom.

CH3-CHCl-CH3

3. 1-Chloro-2-methylpropane: In this isomer, the chlorine atom is attached to the first carbon atom of the main chain, and one methyl group is attached to the third carbon atom.

CH3-CH(CH3)-CH2-Cl

4. 2-Chloro-2-methylpropane: In this isomer, the chlorine atom is attached to the second carbon atom of the main chain, and one methyl group is attached to the third carbon atom.

(CH3)2C-CH2-Cl

5. 2-Chloro-1-methylpropane: In this isomer, the chlorine atom is attached to the second carbon atom of the main chain, and one methyl group is attached to the first carbon atom.

CH3-CH(CH3)-CH3

Total number of isomers:
Therefore, the total number of structural isomers possible in C3H7Cl is 7.

Conclusion:
In summary, C3H7Cl has two straight-chain isomers and five branched-chain isomers, making a