Provide a systematic name for following molecule.

• A. isobutylmethylpentylamine
• B. N-isobutyl-N-methyl-2-pentanamine
• C. isobutylmethylpentyl amine
• D. N-isobutyl-N-methylpentanamine

Answer: (B)

Verified step by step guidance

1. Identify the longest carbon chain attached to the nitrogen atom. In this case, the longest chain is a pentane chain, which consists of 5 carbon atoms.
2. Determine the substituents attached to the nitrogen atom. Here, the nitrogen is bonded to an isobutyl group and a methyl group.
3. Assign the position of the substituents on the nitrogen atom. The isobutyl group and the methyl group are both attached to the nitrogen, so they are prefixed with 'N-' to indicate their attachment to the nitrogen.
4. Number the carbon chain to give the substituents the lowest possible numbers. The main chain is numbered from the end closest to the nitrogen, ensuring the substituents have the lowest possible locants.
5. Combine the information to form the systematic name. The name is constructed by listing the substituents in alphabetical order, followed by the name of the main chain. The correct systematic name is 'N-isobutyl-N-methyl-2-pentanamine'.