Given the following compound: ${\mathrm{CH}}_3\mathrm{CH}-{\mathrm{CH}}_2\mathrm{CH}-{\mathrm{CH}}_3$, what is its IUPAC systematic name?

• A. 2,2-dimethylpropane
• B. pentane
• C. isopentane
• D. 2-methylbutane

Answer: (D)

Verified step by step guidance

1. Identify the longest continuous carbon chain in the given compound. This chain determines the base name of the compound according to IUPAC nomenclature.
2. Number the carbon atoms in the longest chain starting from the end nearest to the substituent (branch) to give the substituent the lowest possible number.
3. Identify and name the substituents (alkyl groups) attached to the main chain. In this case, look for methyl groups attached to the main chain.
4. Combine the names of the substituents with the base name of the longest chain, using the appropriate locants (numbers) to indicate the position of each substituent. Use prefixes like 'methyl' and numbers to specify their positions.
5. Write the full IUPAC name by placing the substituent names and their positions before the base name, ensuring correct alphabetical order and hyphenation, resulting in a name such as \$2\text{-}methylbutane$.