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How many isomers does hexane \(\left( C_6H_{14} \right)\) have?

A. Four
B. Five
C. Six
D. Seven

Sagot :

To determine the number of isomers of hexane (C₆H₁₄), it's essential to understand what an isomer is. Isomers are compounds with the same molecular formula but different structural arrangements of atoms.

For C₆H₁₄, we are primarily interested in its structural isomers. Here, we need to consider the different ways the carbon atoms can be arranged to form distinct structures while maintaining the same molecular formula.

Let's list and briefly describe each of the isomers:

1. n-Hexane: The straight-chain form of hexane.
2. 2-Methylpentane (Isohexane): A five-carbon chain with one methyl group (-CH₃) attached to the second carbon.
3. 3-Methylpentane: Similar to 2-Methylpentane but with the methyl group attached to the third carbon.
4. 2,2-Dimethylbutane: A four-carbon chain with two methyl groups attached to the second carbon.
5. 2,3-Dimethylbutane: A four-carbon chain with one methyl group attached to the second carbon and another to the third carbon.

Considering these descriptions, the total number of isomers of hexane (C₆H₁₄) can be summarized.

Thus, hexane (C₆H₁₄) has five isomers.

Answer:: The possible answer is given below. :

Explanation:Hexane (C6H14) has five isomers ¹ ²:

- 2-Methylpentane (Isohexane)

- 3-Methylpentane

- 2,3-Dimethylbutane

- 2,2-Dimethylbutane

- Normal hexane (n-Hexane), also known as hexane or Neohexane

The term "hexanes" refers to a mixture of these isomers, primarily n-Hexane but also other compounds like 2-methylpentane, 3-methylpentane, and cycloalkanes ².