Structural Isomers in C5H11Br

There are multiple structural isomers that can be formed with the molecular formula C5H11Br. Structural isomers are compounds that have the same molecular formula but different structural arrangements. In order to determine the number of structural isomers, we need to analyze the different possibilities for arranging the atoms in the molecule.

1. Straight-Chain Isomers
The first type of structural isomers we can consider are the straight-chain isomers. These isomers have a linear arrangement of carbon atoms with the bromine atom attached to one of the carbon atoms.

1-pentan-1-ol
CH3-CH2-CH2-CH2-CH2-Br

1-pentan-2-ol
CH3-CH2-CH2-CH(Br)-CH3

1-pentan-3-ol
CH3-CH2-CH(Br)-CH2-CH3

1-pentan-4-ol
CH3-CH(Br)-CH2-CH2-CH3

2. Branched Isomers
Another possibility is the formation of branched isomers. These isomers have a different arrangement of carbon atoms, creating branches in the molecule.

2-methylbutan-1-ol
CH3-CH(CH3)-CH2-CH2-Br

2-methylbutan-2-ol
CH3-CH(CH3)-CH(Br)-CH3

3-methylbutan-1-ol
CH3-CH2-CH(CH3)-CH2-Br

3-methylbutan-2-ol
CH3-CH2-CH(CH3)-CH(Br)-CH3

2,2-dimethylpropan-1-ol
CH3-C(CH3)2-CH2-CH2-Br

2,2-dimethylpropan-2-ol
CH3-C(CH3)2-CH(Br)-CH3

Total Number of Structural Isomers
By considering both the straight-chain and branched isomers, we can count a total of 8 structural isomers for the molecular formula C5H11Br.

1-pentan-1-ol
1-pentan-2-ol
1-pentan-3-ol
1-pentan-4-ol
2-methylbutan-1-ol
2-methylbutan-2-ol
3-methylbutan-1-ol
3-methylbutan-2-ol
2,2-dimethylpropan-1-ol
2,2-dimethylpropan-2-ol