IUPAC name of neo-pentane is

• (A) 2 - ethylpentane
• (B) 2,2 - dimethylpentane
• (C) 2,2 - dimethylpropane
• (D) 2 - dimethylpentane

The IUPAC name of neo-pentane is (C) 2,2-dimethylpropane. This compound has a branched structure, which distinguishes it from other isomers of pentane.

Understanding Neo-pentane

Neo-pentane is a type of alkane with five carbon atoms. Its unique structure includes a central carbon atom bonded to four other carbon atoms, making it a highly branched molecule.

Why the Name Matters

The name "2,2-dimethylpropane" indicates that there are two methyl groups attached to the second carbon of a three-carbon propane backbone. This naming convention helps chemists understand the compound's structure and properties quickly.

Comparison with Other Options

• 2-ethylpentane: This has a straight-chain structure with an ethyl group.
• 2,2-dimethylpentane: This has a different arrangement with five carbons and two methyl groups on the second carbon.
• 2-dimethylpentane: This is also a straight-chain structure but with only one methyl group on the second carbon.

In summary, neo-pentane's correct IUPAC name is 2,2-dimethylpropane, highlighting its unique branched structure among pentane isomers.