Question

Write the IUPAC name of the given compound:

Answer 1

One can solve this question by keeping in mind the IUPAC nomenclature rules. If nitrogen is present, it can be either amine or amide functional group. Parent carbon chain can be determined by calculating the number of carbons in the longest carbon chain.

Complete step by step answer:
-If organic compounds contain one principal functional group then the longest continuous chain of carbon atoms having that functional group is selected. Functional groups are specific substituents in the molecules which are responsible for the characteristic chemical reactions of those molecules.
-The IUPAC nomenclature of organic chemistry is a system of organic chemical compounds in nomenclature of chemicals as stated by the International Union of Pure and Applied Chemistry. Informally we call it the Blue Book. The book mentions certain rules for naming of compounds having functional groups.
-As per IUPAC rules, the first thing is to select the longest continuous chain. In the given compound, we see that the chain starting from the right most carbon atom has maximum carbons and therefore, it is the parent chain having 3 carbon atoms. Thus, we can say that the root word is propane.
-On propane carbon chain, a methyl group is present on second position and the chain is bonded to nitrogen atom or amino group giving it a suffix ‘amine’. So, we can now say that it is 2-methyl propanamine. But there is one methyl group attached to the amino group on its other side, this modifies the name to N-methyl-2-methyl propanamine.

Note:
Amine group is represented by $N{H_3}$. When we replace the hydrogens attached to nitrogen with any other compound, it becomes either primary or secondary or tertiary amine with respect to the number of hydrogens replaced. In our case, two hydrogens were replaced, so the compound is secondary amine.